40 935 859 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 =	450000
B2 =	11250000

Status	Date	User	Residue	Shift	Software
Verified	2008-09-24	Enrico Farina	347CF6D6951B399A	40661680	Windows,Prime95,v24 final,(aka Wc1)
Bad	2016-04-23	Bruno Victal	D07CB8BFAFD65D2A	28738021	Windows 64-bit,Prime95,v28.9,build 2
Verified	2016-04-29	Mark Rose	347CF6D6951B399A	20016423	Linux 64-bit,Prime95,v28.9,build 2

History

Date	User	Type	Result
2016-05-13	Bruno Victal	NF-PM1	B1=450000, B2=11250000, E=12
2016-04-29	Mark Rose	C-LL	347CF6D6951B399A
2016-04-23	Bruno Victal	C-LL	D07CB8BFAFD65D2A
2016-04-19	Bruno Victal	NF	no factor TF: 73-74
2016-04-19	Bruno Victal	NF	no factor TF: 72-73
2015-06-07	TheJudger	NF	no factor TF: 71-72
2014-12-25	ktony	NF	no factor TF: 70-71
2014-12-25	ktony	NF	no factor TF: 69-70
2013-12-02	Axelsson	NF	no factor TF: 68-69
2008-09-23	enrico	C-LL	347CF6D6951B399A
2007-11-17	-anonymous-	NF-PM1	B1=670000
2007-02-05	-anonymous-	NF	no factor TF: 1-68
2006-08-25	-anonymous-	NF	no factor TF: 1-62