40 538 041 Exponent Status

Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

M_n

Details

Composite: proven not-prime with Lucas-Lehmer test

No factors below 2⁷⁴

TF target 2⁷²

P-1

B1 =	375000
B2 =	7218750

Status	Date	User	Residue	Shift	Software
Verified	2012-03-11	Dubslow	AA79B62B24AAA9E0	2385757	Linux 64-bit,Prime95,v27.4,build 1
Verified	2012-03-28	-anonymous-	AA79B62B24AAA9E0	23569594	Windows,Prime95,v24 final,(aka Wc1)

History

Date	User	Type	Result
2020-01-11	-anonymous-	NF	no factor TF: 73-74
2012-03-28	-anonymous-	C-LL	AA79B62B24AAA9E0
2012-03-11	Dubslow	C-LL	AA79B62B24AAA9E0
2012-03-02	lycorn	NF	no factor TF: 72-73
2012-03-02	Dubslow	NF	no factor TF: 68-72
2008-02-03	-anonymous-	NF-PM1	B1=670000
2007-01-16	scineram	NF	no factor TF: 1-68

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