Sha256: abe24f93cedbfa9961f9b286eb673e040518098f28b3cd012fd29c91d23197f4
Contents?: true
Size: 171 Bytes
Versions: 8
Compression:
Stored size: 171 Bytes
Contents
class Integer
def cullen?
return true if self == 1
factors = (self - 1).divisors.sort
factors.first(factors.size/2).any?{|n| n * 2**n + 1 == self}
end
end
Version data entries
8 entries across 8 versions & 1 rubygems