Fermat pseudoprimes: Difference between revisions
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{{
A [[wp:Fermat_pseudoprime|Fermat pseudoprime]] is a positive composite integer that passes the Fermat primality test.
Line 311:
Base 20 - Up to 50000: 66 First 20: (21 57 133 231 399 561 671 861 889 1281 1653 1729 1891 2059 2413 2501 2761 2821 2947 3059 )
Real: 00:00:00.632
</pre>
=={{header|FreeBASIC}}==
<syntaxhighlight lang="vb">'#include "isprime.bas"
Function powMod (a As Uinteger, n As Uinteger, m As Uinteger) As Uinteger
' Return "a^n mod m".
Dim As Uinteger a1 = a Mod m
Dim As Uinteger n1 = n
Dim As Uinteger result
If a1 > 0 Then
result = 1
While n1 > 0
If (n1 And 1) <> 0 Then result = (result * a1) Mod m
n1 Shr= 1
a1 = (a1 * a1) Mod m
Wend
End If
Return result
End Function
Function isFermatPseudoprime(x As Uinteger, a As Uinteger) As Boolean
Return Iif(isPrime(x), False, powMod(a, x - 1, x) = 1)
End Function
Dim As Uinteger a, b, limite = 50000
Print "First 20 Fermat pseudoprimes:"
For a = 1 To 20
Dim As Uinteger total = 0
Dim As Uinteger x = 2
Dim As Uinteger primer20(1 To 20)
For b = 1 To limite
While x <= b
If isFermatPseudoprime(x, a) Then
total += 1
If total <= 20 Then primer20(total) = x
End If
x += 1
Wend
Next
Print Using "Base ## to ##### total: #####_, first: "; a; limite; total;
For b = 1 To 20
Print Using "######"; primer20(b);
Next b
Print
Next a
Sleep</syntaxhighlight>
{{out}}
<pre>First 20 Fermat pseudoprimes:
Base 1 to 50000 total: 44866, first: 4 6 8 9 10 12 14 15 16 18 20 21 22 24 25 26 27 28 30 32
Base 2 to 50000 total: 55, first: 341 561 645 1105 1387 1729 1905 2047 2465 2701 2821 3277 4033 4369 4371 4681 5461 6601 7957 8321
Base 3 to 50000 total: 53, first: 91 121 286 671 703 949 1105 1541 1729 1891 2465 2665 2701 2821 3281 3367 3751 4961 5551 6601
Base 4 to 50000 total: 111, first: 15 85 91 341 435 451 561 645 703 1105 1247 1271 1387 1581 1695 1729 1891 1905 2047 2071
Base 5 to 50000 total: 54, first: 4 124 217 561 781 1541 1729 1891 2821 4123 5461 5611 5662 5731 6601 7449 7813 8029 8911 9881
Base 6 to 50000 total: 74, first: 35 185 217 301 481 1105 1111 1261 1333 1729 2465 2701 2821 3421 3565 3589 3913 4123 4495 5713
Base 7 to 50000 total: 49, first: 6 25 325 561 703 817 1105 1825 2101 2353 2465 3277 4525 4825 6697 8321 10225 10585 10621 11041
Base 8 to 50000 total: 150, first: 9 21 45 63 65 105 117 133 153 231 273 341 481 511 561 585 645 651 861 949
Base 9 to 50000 total: 113, first: 4 8 28 52 91 121 205 286 364 511 532 616 671 697 703 946 949 1036 1105 1288
Base 10 to 50000 total: 65, first: 9 33 91 99 259 451 481 561 657 703 909 1233 1729 2409 2821 2981 3333 3367 4141 4187
Base 11 to 50000 total: 61, first: 10 15 70 133 190 259 305 481 645 703 793 1105 1330 1729 2047 2257 2465 2821 4577 4921
Base 12 to 50000 total: 91, first: 65 91 133 143 145 247 377 385 703 1045 1099 1105 1649 1729 1885 1891 2041 2233 2465 2701
Base 13 to 50000 total: 68, first: 4 6 12 21 85 105 231 244 276 357 427 561 1099 1785 1891 2465 2806 3605 5028 5149
Base 14 to 50000 total: 69, first: 15 39 65 195 481 561 781 793 841 985 1105 1111 1541 1891 2257 2465 2561 2665 2743 3277
Base 15 to 50000 total: 42, first: 14 341 742 946 1477 1541 1687 1729 1891 1921 2821 3133 3277 4187 6541 6601 7471 8701 8911 9073
Base 16 to 50000 total: 145, first: 15 51 85 91 255 341 435 451 561 595 645 703 1105 1247 1261 1271 1285 1387 1581 1687
Base 17 to 50000 total: 63, first: 4 8 9 16 45 91 145 261 781 1111 1228 1305 1729 1885 2149 2821 3991 4005 4033 4187
Base 18 to 50000 total: 98, first: 25 49 65 85 133 221 323 325 343 425 451 637 931 1105 1225 1369 1387 1649 1729 1921
Base 19 to 50000 total: 93, first: 6 9 15 18 45 49 153 169 343 561 637 889 905 906 1035 1105 1629 1661 1849 1891
Base 20 to 50000 total: 66, first: 21 57 133 231 399 561 671 861 889 1281 1653 1729 1891 2059 2413 2501 2761 2821 2947 3059</pre>
=={{header|J}}==
<syntaxhighlight lang="j">fermat=. {{1 = x (y&|@^) <: y}}"0
(>: i. 20) ([ ,. fermat/ (# , 20&{.)@# ]) (#~ 0&p:) >: i. 50000</syntaxhighlight>
{{out}}
<pre>
1 44866 4 6 8 9 10 12 14 15 16 18 20 21 22 24 25 26 27 28 30 32
2 55 341 561 645 1105 1387 1729 1905 2047 2465 2701 2821 3277 4033 4369 4371 4681 5461 6601 7957 8321
3 53 91 121 286 671 703 949 1105 1541 1729 1891 2465 2665 2701 2821 3281 3367 3751 4961 5551 6601
4 111 15 85 91 341 435 451 561 645 703 1105 1247 1271 1387 1581 1695 1729 1891 1905 2047 2071
5 54 4 124 217 561 781 1541 1729 1891 2821 4123 5461 5611 5662 5731 6601 7449 7813 8029 8911 9881
6 74 35 185 217 301 481 1105 1111 1261 1333 1729 2465 2701 2821 3421 3565 3589 3913 4123 4495 5713
7 49 6 25 325 561 703 817 1105 1825 2101 2353 2465 3277 4525 4825 6697 8321 10225 10585 10621 11041
8 150 9 21 45 63 65 105 117 133 153 231 273 341 481 511 561 585 645 651 861 949
9 113 4 8 28 52 91 121 205 286 364 511 532 616 671 697 703 946 949 1036 1105 1288
10 65 9 33 91 99 259 451 481 561 657 703 909 1233 1729 2409 2821 2981 3333 3367 4141 4187
11 61 10 15 70 133 190 259 305 481 645 703 793 1105 1330 1729 2047 2257 2465 2821 4577 4921
12 91 65 91 133 143 145 247 377 385 703 1045 1099 1105 1649 1729 1885 1891 2041 2233 2465 2701
13 68 4 6 12 21 85 105 231 244 276 357 427 561 1099 1785 1891 2465 2806 3605 5028 5149
14 69 15 39 65 195 481 561 781 793 841 985 1105 1111 1541 1891 2257 2465 2561 2665 2743 3277
15 42 14 341 742 946 1477 1541 1687 1729 1891 1921 2821 3133 3277 4187 6541 6601 7471 8701 8911 9073
16 145 15 51 85 91 255 341 435 451 561 595 645 703 1105 1247 1261 1271 1285 1387 1581 1687
17 63 4 8 9 16 45 91 145 261 781 1111 1228 1305 1729 1885 2149 2821 3991 4005 4033 4187
18 98 25 49 65 85 133 221 323 325 343 425 451 637 931 1105 1225 1369 1387 1649 1729 1921
19 93 6 9 15 18 45 49 153 169 343 561 637 889 905 906 1035 1105 1629 1661 1849 1891
20 66 21 57 133 231 399 561 671 861 889 1281 1653 1729 1891 2059 2413 2501 2761 2821 2947 3059
</pre>
Line 344 ⟶ 441:
Base 19 up to 50000: 93 First 20: [6, 9, 15, 18, 45, 49, 153, 169, 343, 561, 637, 889, 905, 906, 1035, 1105, 1629, 1661, 1849, 1891]
Base 20 up to 50000: 66 First 20: [21, 57, 133, 231, 399, 561, 671, 861, 889, 1281, 1653, 1729, 1891, 2059, 2413, 2501, 2761, 2821, 2947, 3059]
</pre>
=={{header|Mathematica}}/{{header|Wolfram Language}}==
<syntaxhighlight lang="Mathematica">
ispseudo[n_, base_] := (!PrimeQ[n]) && (PowerMod[base, n - 1, n] == 1)
Do[
pseudos = Select[Range[1, 50000], ispseudo[#, b] &];
Print["Base ", b, " up to 50000: ", Length[pseudos], " First 20: ", Take[pseudos, 20]],
{b, 1, 20}
]
</syntaxhighlight>
{{out}}
<pre>
Base 1 up to 50000: 44866 First 20: {4, 6, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 22, 24, 25, 26, 27, 28, 30, 32}
Base 2 up to 50000: 55 First 20: {341, 561, 645, 1105, 1387, 1729, 1905, 2047, 2465, 2701, 2821, 3277, 4033, 4369, 4371, 4681, 5461, 6601, 7957, 8321}
Base 3 up to 50000: 53 First 20: {91, 121, 286, 671, 703, 949, 1105, 1541, 1729, 1891, 2465, 2665, 2701, 2821, 3281, 3367, 3751, 4961, 5551, 6601}
Base 4 up to 50000: 111 First 20: {15, 85, 91, 341, 435, 451, 561, 645, 703, 1105, 1247, 1271, 1387, 1581, 1695, 1729, 1891, 1905, 2047, 2071}
Base 5 up to 50000: 54 First 20: {4, 124, 217, 561, 781, 1541, 1729, 1891, 2821, 4123, 5461, 5611, 5662, 5731, 6601, 7449, 7813, 8029, 8911, 9881}
Base 6 up to 50000: 74 First 20: {35, 185, 217, 301, 481, 1105, 1111, 1261, 1333, 1729, 2465, 2701, 2821, 3421, 3565, 3589, 3913, 4123, 4495, 5713}
Base 7 up to 50000: 49 First 20: {6, 25, 325, 561, 703, 817, 1105, 1825, 2101, 2353, 2465, 3277, 4525, 4825, 6697, 8321, 10225, 10585, 10621, 11041}
Base 8 up to 50000: 150 First 20: {9, 21, 45, 63, 65, 105, 117, 133, 153, 231, 273, 341, 481, 511, 561, 585, 645, 651, 861, 949}
Base 9 up to 50000: 113 First 20: {4, 8, 28, 52, 91, 121, 205, 286, 364, 511, 532, 616, 671, 697, 703, 946, 949, 1036, 1105, 1288}
Base 10 up to 50000: 65 First 20: {9, 33, 91, 99, 259, 451, 481, 561, 657, 703, 909, 1233, 1729, 2409, 2821, 2981, 3333, 3367, 4141, 4187}
Base 11 up to 50000: 61 First 20: {10, 15, 70, 133, 190, 259, 305, 481, 645, 703, 793, 1105, 1330, 1729, 2047, 2257, 2465, 2821, 4577, 4921}
Base 12 up to 50000: 91 First 20: {65, 91, 133, 143, 145, 247, 377, 385, 703, 1045, 1099, 1105, 1649, 1729, 1885, 1891, 2041, 2233, 2465, 2701}
Base 13 up to 50000: 68 First 20: {4, 6, 12, 21, 85, 105, 231, 244, 276, 357, 427, 561, 1099, 1785, 1891, 2465, 2806, 3605, 5028, 5149}
Base 14 up to 50000: 69 First 20: {15, 39, 65, 195, 481, 561, 781, 793, 841, 985, 1105, 1111, 1541, 1891, 2257, 2465, 2561, 2665, 2743, 3277}
Base 15 up to 50000: 42 First 20: {14, 341, 742, 946, 1477, 1541, 1687, 1729, 1891, 1921, 2821, 3133, 3277, 4187, 6541, 6601, 7471, 8701, 8911, 9073}
Base 16 up to 50000: 145 First 20: {15, 51, 85, 91, 255, 341, 435, 451, 561, 595, 645, 703, 1105, 1247, 1261, 1271, 1285, 1387, 1581, 1687}
Base 17 up to 50000: 63 First 20: {4, 8, 9, 16, 45, 91, 145, 261, 781, 1111, 1228, 1305, 1729, 1885, 2149, 2821, 3991, 4005, 4033, 4187}
Base 18 up to 50000: 98 First 20: {25, 49, 65, 85, 133, 221, 323, 325, 343, 425, 451, 637, 931, 1105, 1225, 1369, 1387, 1649, 1729, 1921}
Base 19 up to 50000: 93 First 20: {6, 9, 15, 18, 45, 49, 153, 169, 343, 561, 637, 889, 905, 906, 1035, 1105, 1629, 1661, 1849, 1891}
Base 20 up to 50000: 66 First 20: {21, 57, 133, 231, 399, 561, 671, 861, 889, 1281, 1653, 1729, 1891, 2059, 2413, 2501, 2761, 2821, 2947, 3059}
</pre>
=={{header|Nim}}==
<syntaxhighlight lang="Nim">import std/[strformat, strutils]
proc powMod*(a, n, m: int): int =
## Return "a^n mod m".
var a = a mod m
var n = n
if a > 0:
result = 1
while n > 0:
if (n and 1) != 0:
result = (result * a) mod m
n = n shr 1
a = (a * a) mod m
func isPrime(n: Natural): bool =
## Return true if "n" is prime.
if n < 2: return false
if (n and 1) == 0: return n == 2
if n mod 3 == 0: return n == 3
var k = 5
var delta = 2
while k * k <= n:
if n mod k == 0: return false
inc k, delta
delta = 6 - delta
result = true
func isFermatPseudoprime(x, a: int): bool =
## Return true is "x" is a Fermat pseudoprime to base "a".
if x.isPrime: return false
result = powMod(a, x - 1, x) == 1
const Lim = 50_000
for a in 1..20:
var count = 0
var first20: seq[int]
for x in 1..Lim:
if x.isFermatPseudoprime(a):
inc count
if count <= 20:
first20.add x
echo &"Base {a}:"
echo &" Number of Fermat pseudoprimes up to {insertSep($Lim)}: {count}"
echo &" First 20: {first20.join(\" \")}"
</syntaxhighlight>
{{out}}
<pre>Base 1:
Number of Fermat pseudoprimes up to 50_000: 44866
First 20: 4 6 8 9 10 12 14 15 16 18 20 21 22 24 25 26 27 28 30 32
Base 2:
Number of Fermat pseudoprimes up to 50_000: 55
First 20: 341 561 645 1105 1387 1729 1905 2047 2465 2701 2821 3277 4033 4369 4371 4681 5461 6601 7957 8321
Base 3:
Number of Fermat pseudoprimes up to 50_000: 53
First 20: 91 121 286 671 703 949 1105 1541 1729 1891 2465 2665 2701 2821 3281 3367 3751 4961 5551 6601
Base 4:
Number of Fermat pseudoprimes up to 50_000: 111
First 20: 15 85 91 341 435 451 561 645 703 1105 1247 1271 1387 1581 1695 1729 1891 1905 2047 2071
Base 5:
Number of Fermat pseudoprimes up to 50_000: 54
First 20: 4 124 217 561 781 1541 1729 1891 2821 4123 5461 5611 5662 5731 6601 7449 7813 8029 8911 9881
Base 6:
Number of Fermat pseudoprimes up to 50_000: 74
First 20: 35 185 217 301 481 1105 1111 1261 1333 1729 2465 2701 2821 3421 3565 3589 3913 4123 4495 5713
Base 7:
Number of Fermat pseudoprimes up to 50_000: 49
First 20: 6 25 325 561 703 817 1105 1825 2101 2353 2465 3277 4525 4825 6697 8321 10225 10585 10621 11041
Base 8:
Number of Fermat pseudoprimes up to 50_000: 150
First 20: 9 21 45 63 65 105 117 133 153 231 273 341 481 511 561 585 645 651 861 949
Base 9:
Number of Fermat pseudoprimes up to 50_000: 113
First 20: 4 8 28 52 91 121 205 286 364 511 532 616 671 697 703 946 949 1036 1105 1288
Base 10:
Number of Fermat pseudoprimes up to 50_000: 65
First 20: 9 33 91 99 259 451 481 561 657 703 909 1233 1729 2409 2821 2981 3333 3367 4141 4187
Base 11:
Number of Fermat pseudoprimes up to 50_000: 61
First 20: 10 15 70 133 190 259 305 481 645 703 793 1105 1330 1729 2047 2257 2465 2821 4577 4921
Base 12:
Number of Fermat pseudoprimes up to 50_000: 91
First 20: 65 91 133 143 145 247 377 385 703 1045 1099 1105 1649 1729 1885 1891 2041 2233 2465 2701
Base 13:
Number of Fermat pseudoprimes up to 50_000: 68
First 20: 4 6 12 21 85 105 231 244 276 357 427 561 1099 1785 1891 2465 2806 3605 5028 5149
Base 14:
Number of Fermat pseudoprimes up to 50_000: 69
First 20: 15 39 65 195 481 561 781 793 841 985 1105 1111 1541 1891 2257 2465 2561 2665 2743 3277
Base 15:
Number of Fermat pseudoprimes up to 50_000: 42
First 20: 14 341 742 946 1477 1541 1687 1729 1891 1921 2821 3133 3277 4187 6541 6601 7471 8701 8911 9073
Base 16:
Number of Fermat pseudoprimes up to 50_000: 145
First 20: 15 51 85 91 255 341 435 451 561 595 645 703 1105 1247 1261 1271 1285 1387 1581 1687
Base 17:
Number of Fermat pseudoprimes up to 50_000: 63
First 20: 4 8 9 16 45 91 145 261 781 1111 1228 1305 1729 1885 2149 2821 3991 4005 4033 4187
Base 18:
Number of Fermat pseudoprimes up to 50_000: 98
First 20: 25 49 65 85 133 221 323 325 343 425 451 637 931 1105 1225 1369 1387 1649 1729 1921
Base 19:
Number of Fermat pseudoprimes up to 50_000: 93
First 20: 6 9 15 18 45 49 153 169 343 561 637 889 905 906 1035 1105 1629 1661 1849 1891
Base 20:
Number of Fermat pseudoprimes up to 50_000: 66
First 20: 21 57 133 231 399 561 671 861 889 1281 1653 1729 1891 2059 2413 2501 2761 2821 2947 3059
</pre>
Line 448 ⟶ 692:
20: 21 57 133 231 399 561 671 861 889 1281 1653 1729 1891 2059 2413 2501 2761 2821 2947 3059 35 49 66 101
</pre>
== [[Python]] ==
Translated from the Julia version.<syntaxhighlight lang="python3">
from sympy import isprime
def ispseudo(n, base):
return not isprime(n) and pow(base, n - 1, n) == 1
for b in range(1, 21):
pseudos = [n for n in range(1, 50001) if ispseudo(n, b)]
print(f"Base {str(b).rjust(2)} up to 50000: {str(len(pseudos)).rjust(5)} First 20: {pseudos[:20]}")
</syntaxhighlight>'''Output:'''
Base 1 up to 50000: 44866 First 20: [4, 6, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 22, 24, 25, 26, 27, 28, 30, 32]
Base 2 up to 50000: 55 First 20: [341, 561, 645, 1105, 1387, 1729, 1905, 2047, 2465, 2701, 2821, 3277, 4033, 4369, 4371, 4681, 5461, 6601, 7957, 8321]
Base 3 up to 50000: 53 First 20: [91, 121, 286, 671, 703, 949, 1105, 1541, 1729, 1891, 2465, 2665, 2701, 2821, 3281, 3367, 3751, 4961, 5551, 6601]
Base 4 up to 50000: 111 First 20: [15, 85, 91, 341, 435, 451, 561, 645, 703, 1105, 1247, 1271, 1387, 1581, 1695, 1729, 1891, 1905, 2047, 2071]
Base 5 up to 50000: 54 First 20: [4, 124, 217, 561, 781, 1541, 1729, 1891, 2821, 4123, 5461, 5611, 5662, 5731, 6601, 7449, 7813, 8029, 8911, 9881]
Base 6 up to 50000: 74 First 20: [35, 185, 217, 301, 481, 1105, 1111, 1261, 1333, 1729, 2465, 2701, 2821, 3421, 3565, 3589, 3913, 4123, 4495, 5713]
Base 7 up to 50000: 49 First 20: [6, 25, 325, 561, 703, 817, 1105, 1825, 2101, 2353, 2465, 3277, 4525, 4825, 6697, 8321, 10225, 10585, 10621, 11041]
Base 8 up to 50000: 150 First 20: [9, 21, 45, 63, 65, 105, 117, 133, 153, 231, 273, 341, 481, 511, 561, 585, 645, 651, 861, 949]
Base 9 up to 50000: 113 First 20: [4, 8, 28, 52, 91, 121, 205, 286, 364, 511, 532, 616, 671, 697, 703, 946, 949, 1036, 1105, 1288]
Base 10 up to 50000: 65 First 20: [9, 33, 91, 99, 259, 451, 481, 561, 657, 703, 909, 1233, 1729, 2409, 2821, 2981, 3333, 3367, 4141, 4187]
Base 11 up to 50000: 61 First 20: [10, 15, 70, 133, 190, 259, 305, 481, 645, 703, 793, 1105, 1330, 1729, 2047, 2257, 2465, 2821, 4577, 4921]
Base 12 up to 50000: 91 First 20: [65, 91, 133, 143, 145, 247, 377, 385, 703, 1045, 1099, 1105, 1649, 1729, 1885, 1891, 2041, 2233, 2465, 2701]
Base 13 up to 50000: 68 First 20: [4, 6, 12, 21, 85, 105, 231, 244, 276, 357, 427, 561, 1099, 1785, 1891, 2465, 2806, 3605, 5028, 5149]
Base 14 up to 50000: 69 First 20: [15, 39, 65, 195, 481, 561, 781, 793, 841, 985, 1105, 1111, 1541, 1891, 2257, 2465, 2561, 2665, 2743, 3277]
Base 15 up to 50000: 42 First 20: [14, 341, 742, 946, 1477, 1541, 1687, 1729, 1891, 1921, 2821, 3133, 3277, 4187, 6541, 6601, 7471, 8701, 8911, 9073]
Base 16 up to 50000: 145 First 20: [15, 51, 85, 91, 255, 341, 435, 451, 561, 595, 645, 703, 1105, 1247, 1261, 1271, 1285, 1387, 1581, 1687]
Base 17 up to 50000: 63 First 20: [4, 8, 9, 16, 45, 91, 145, 261, 781, 1111, 1228, 1305, 1729, 1885, 2149, 2821, 3991, 4005, 4033, 4187]
Base 18 up to 50000: 98 First 20: [25, 49, 65, 85, 133, 221, 323, 325, 343, 425, 451, 637, 931, 1105, 1225, 1369, 1387, 1649, 1729, 1921]
Base 19 up to 50000: 93 First 20: [6, 9, 15, 18, 45, 49, 153, 169, 343, 561, 637, 889, 905, 906, 1035, 1105, 1629, 1661, 1849, 1891]
Base 20 up to 50000: 66 First 20: [21, 57, 133, 231, 399, 561, 671, 861, 889, 1281, 1653, 1729, 1891, 2059, 2413, 2501, 2761, 2821, 2947, 3059]
=={{header|Quackery}}==
Line 596 ⟶ 872:
Base 19 - Up to 100000: 121 First 20: (6 9 15 18 45 49 153 169 343 561 637 889 905 906 1035 1105 1629 1661 1849 1891)
Base 20 - Up to 100000: 101 First 20: (21 57 133 231 399 561 671 861 889 1281 1653 1729 1891 2059 2413 2501 2761 2821 2947 3059)</pre>
=={{header|Sidef}}==
<syntaxhighlight lang="ruby" line>func generate_fermat_psp(base, upto, n) {
if (base == 1) {
return(n.by { .is_composite }, upto.composite_count)
}
var psp = []
for k in (1..Inf) {
break if (k.pn_primorial > upto)
psp << k.fermat_psp(base, 1, upto)...
}
return(psp.sort.first(n), psp.len)
}
var upto = 1e7
for base in (1..20) {
var (psp, count) = generate_fermat_psp(base, upto, 20)
printf("Base %2d - up to #{upto}: %7d First 20: %s\n", base, count, psp)
}</syntaxhighlight>
{{out}}
<pre style="font-size:80%;">Base 1 - up to 10000000: 9335420 First 20: [4, 6, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 22, 24, 25, 26, 27, 28, 30, 32]
Base 2 - up to 10000000: 750 First 20: [341, 561, 645, 1105, 1387, 1729, 1905, 2047, 2465, 2701, 2821, 3277, 4033, 4369, 4371, 4681, 5461, 6601, 7957, 8321]
Base 3 - up to 10000000: 760 First 20: [91, 121, 286, 671, 703, 949, 1105, 1541, 1729, 1891, 2465, 2665, 2701, 2821, 3281, 3367, 3751, 4961, 5551, 6601]
Base 4 - up to 10000000: 1347 First 20: [15, 85, 91, 341, 435, 451, 561, 645, 703, 1105, 1247, 1271, 1387, 1581, 1695, 1729, 1891, 1905, 2047, 2071]
Base 5 - up to 10000000: 745 First 20: [4, 124, 217, 561, 781, 1541, 1729, 1891, 2821, 4123, 5461, 5611, 5662, 5731, 6601, 7449, 7813, 8029, 8911, 9881]
Base 6 - up to 10000000: 895 First 20: [35, 185, 217, 301, 481, 1105, 1111, 1261, 1333, 1729, 2465, 2701, 2821, 3421, 3565, 3589, 3913, 4123, 4495, 5713]
Base 7 - up to 10000000: 659 First 20: [6, 25, 325, 561, 703, 817, 1105, 1825, 2101, 2353, 2465, 3277, 4525, 4825, 6697, 8321, 10225, 10585, 10621, 11041]
Base 8 - up to 10000000: 1993 First 20: [9, 21, 45, 63, 65, 105, 117, 133, 153, 231, 273, 341, 481, 511, 561, 585, 645, 651, 861, 949]
Base 9 - up to 10000000: 1418 First 20: [4, 8, 28, 52, 91, 121, 205, 286, 364, 511, 532, 616, 671, 697, 703, 946, 949, 1036, 1105, 1288]
Base 10 - up to 10000000: 766 First 20: [9, 33, 91, 99, 259, 451, 481, 561, 657, 703, 909, 1233, 1729, 2409, 2821, 2981, 3333, 3367, 4141, 4187]
Base 11 - up to 10000000: 695 First 20: [10, 15, 70, 133, 190, 259, 305, 481, 645, 703, 793, 1105, 1330, 1729, 2047, 2257, 2465, 2821, 4577, 4921]
Base 12 - up to 10000000: 1091 First 20: [65, 91, 133, 143, 145, 247, 377, 385, 703, 1045, 1099, 1105, 1649, 1729, 1885, 1891, 2041, 2233, 2465, 2701]
Base 13 - up to 10000000: 750 First 20: [4, 6, 12, 21, 85, 105, 231, 244, 276, 357, 427, 561, 1099, 1785, 1891, 2465, 2806, 3605, 5028, 5149]
Base 14 - up to 10000000: 817 First 20: [15, 39, 65, 195, 481, 561, 781, 793, 841, 985, 1105, 1111, 1541, 1891, 2257, 2465, 2561, 2665, 2743, 3277]
Base 15 - up to 10000000: 628 First 20: [14, 341, 742, 946, 1477, 1541, 1687, 1729, 1891, 1921, 2821, 3133, 3277, 4187, 6541, 6601, 7471, 8701, 8911, 9073]
Base 16 - up to 10000000: 1749 First 20: [15, 51, 85, 91, 255, 341, 435, 451, 561, 595, 645, 703, 1105, 1247, 1261, 1271, 1285, 1387, 1581, 1687]
Base 17 - up to 10000000: 763 First 20: [4, 8, 9, 16, 45, 91, 145, 261, 781, 1111, 1228, 1305, 1729, 1885, 2149, 2821, 3991, 4005, 4033, 4187]
Base 18 - up to 10000000: 1161 First 20: [25, 49, 65, 85, 133, 221, 323, 325, 343, 425, 451, 637, 931, 1105, 1225, 1369, 1387, 1649, 1729, 1921]
Base 19 - up to 10000000: 932 First 20: [6, 9, 15, 18, 45, 49, 153, 169, 343, 561, 637, 889, 905, 906, 1035, 1105, 1629, 1661, 1849, 1891]
Base 20 - up to 10000000: 850 First 20: [21, 57, 133, 231, 399, 561, 671, 861, 889, 1281, 1653, 1729, 1891, 2059, 2413, 2501, 2761, 2821, 2947, 3059]</pre>
=={{header|Wren}}==
Line 601 ⟶ 922:
{{libheader|Wren-gmp}}
{{libheader|Wren-fmt}}
<syntaxhighlight lang="
import "./gmp" for Mpz
import "./fmt" for Fmt
| |||