Semiprime: Difference between revisions
Added PROMAL
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6: 2 x 3
semiprime form 1 to 100: 4 6 9 10 14 15 21 22 25 26 33 34 35 38 39 46 49 51 55 57 58 62 65 69 74 77 82 85 86 87 91 93 94 95
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=={{header|PROMAL}}==
<syntaxhighlight lang="promal">
;;; find some semiprimes - numbers with two prime factors
PROGRAM semiPrimes
INCLUDE library
FUNC BYTE isSemiPrime
ARG WORD n
WORD f
WORD factorCount
BYTE result
BEGIN
f = 2
factorCount = 0
WHILE factorCount < 3 AND n > 1
WHILE n % f = 0
factorCount = factorCount + 1
n = n / f
f = f + 1
IF factorCOunt = 2
result = 1
ELSE
result = 0
RETURN result
END
WORD n
BEGIN
OUTPUT "Semiprimes under 100:#C "
FOR n = 1 TO 99
IF isSemiPrime( n )
OUTPUT " #W", n
OUTPUT "#CSemiprimes between 1670 and 1690:#C "
FOR n = 1670 TO 1690
IF isSemiPrime( n )
OUTPUT " #W", n
END
</syntaxhighlight>
{{out}}
<pre>
Semiprimes under 100:
4 6 9 10 14 15 21 22 25 26 33 34 35 38 39 46 49 51 55 57 58 62 65 69 74 77 82 85 86 87 91 93 94 95
Semiprimes between 1670 and 1690:
1671 1673 1678 1679 1681 1685 1687 1689
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