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Dec 7 at 12:43 comment added Gadi A It seems I was mistaken and didn't read their site carefully enough. It seems they still use LL as the final test, and simply switched to Fermat-with-proofs for the initial screening mersenne.org/various/math.php#prp
Dec 7 at 8:21 comment added Gerry Myerson Any documentation on GIMPS abandoning Lucas-Lehmer in favor of Fermat? The link makes no mention of GIMPS nor Lucas-Lehmer nor Fermat nor Mersenne.
Dec 7 at 7:23 history asked Gadi A CC BY-SA 4.0