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Lucas-Lehmer test: Difference between revisions
F#
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=={{header|F#}}==
Simple arbitrary-precision version:
<lang fsharp>let rec s mp n =
if n = 1 then 4I % mp else ((s mp (n - 1)) ** 2 - 2I) % mp
[ for p in 2..47 do
if p = 2 || s ((1I <<< p) - 1I) (p - 1) = 0I then
yield p ]</lang>
=={{header|Fortran}}==
{{works with|Fortran|90 and later}}
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