Sha256: a011eda77a1f8f03e0c4e444307f2992d756236ba5b0afe4b4377207935eb7e0
Contents?: true
Size: 734 Bytes
Versions: 20
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Stored size: 734 Bytes
Contents
describe Integer, "#mersenne_prime?" do
# A000668
@seq = [3,7,31,127,8191,131071,524287,2147483647,
2305843009213693951,618970019642690137449562111,
162259276829213363391578010288127,
170141183460469231731687303715884105727].to_seq
@seq.first(6).each do |n|
it "should return true for Mersenne prime #{n}" do
n.should be_mersenne_prime
end
end
@seq.invert.first(500).sample(10).each do |n|
it "should return false for non-Mersenne prime #{n}" do
n.should_not be_mersenne_prime
end
end
(Prime.first(12).to_a - @seq.to_a).each do |n|
it "should return false for a prime which isn't Mersenne: #{n}" do
n.should_not be_mersenne_prime
end
end
end
Version data entries
20 entries across 20 versions & 1 rubygems