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MiSawa/gist:3388569

Created August 18, 2012 17:29
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gistfile1.rb
require "prime"
mx = 1000
res = [0, 0, 0]
for b in -mx+1...mx
next unless b.prime?
for a in -mx+1...mx
l = 0
l += 1 while (l*l + a*l + b).prime?
res = [res, [l, a, b]].max
end
end
p res[1..-1].inject(:*)
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