Find prime n such that reversed n is also prime: Difference between revisions
Find prime n such that reversed n is also prime (view source)
Revision as of 21:35, 12 February 2022
, 2 years agoFind prime n such that reversed n is also prime en Python
Alextretyak (talk | contribs) (Added 11l) |
(Find prime n such that reversed n is also prime en Python) |
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82,439 reverse primes < 10,000,000 found.
</pre>
=={{header|Python}}==
<lang python>#!/usr/bin/python
def isPrime(n):
for i in range(2, int(n**0.5) + 1):
if n % i == 0:
return False
return True
def isBackPrime(n):
if not isPrime(n):
return False
m = 0
while n:
m *= 10
m += n % 10
n //= 10
return isPrime(m)
if __name__ == '__main__':
for n in range(2, 499):
if isBackPrime(n):
print(n, end=' ');</lang>
{{out}}
<pre>2 3 5 7 11 13 17 31 37 71 73 79 97 101 107 113 131 149 151 157 167 179 181 191 199 311 313 337 347 353 359 373 383 389</pre>
=={{header|PILOT}}==
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