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Old 2020-07-11, 19:34   #155
alpertron's Avatar
Aug 2002
Buenos Aires, Argentina

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After running my Nvidia GTX 950 for 30 days, I was able to find more than 60 factors in the ranges 71->72 bits, 72->73 bits and partially in 73->74 bits, reducing the number of unfactored Mersenne numbers in the range 987.9M to 1999.

According to, the number is 2001, but this includes the factored numbers M987977819 and M987976229 that were found after 00:00 GMT today, so the current number is 1999.
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