Semiprime: Difference between revisions
m
→{{header|Ruby}}
Line 170:
class Integer
def semi_prime?
prime_division.map( &:last ).inject( &:+ ) == 2
end
end
p 1679.semi_prime? # true
p ( 1..100 ).select( &:semi_prime? )
# [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]
</lang>
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