40 018 261 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

TF

No factors below 2⁷⁴

TF target 2⁷²

P-1

B1 =	230000
B2 =	4945000

Status	Date	User	Residue	Shift
Verified	2009-04-14	curtisc	7FEB09C1DE651A2C	14478527
Verified	2017-01-30	Sergey Nosov	7FEB09C1DE651A2C	20048287

History

Date	User	Type	Result
2020-02-14	-Anonymous-	NF	no factor from 2^73 to 2^74
2019-10-04	-Anonymous-	NF	no factor from 2^72 to 2^73
2017-01-30	Sergey Nosov	C-LL	7FEB09C1DE651A2C
2016-02-23	Mark Rose	NF	no factor from 2^66 to 2^67
2016-02-23	Mark Rose	NF	no factor from 2^61 to 2^64
2016-02-23	Mark Rose	NF	no factor from 2^67 to 2^68
2016-02-23	Mark Rose	NF	no factor from 2^65 to 2^66
2016-02-23	Mark Rose	NF	no factor from 2^64 to 2^65
2014-12-28	Chuck	NF	no factor from 2^71 to 2^72
2014-11-25	Architects Cubed	NF	no factor from 2^70 to 2^71
2014-11-24	Architects Cubed	NF	no factor from 2^69 to 2^70
2013-10-21	Carsten Kossendey	NF	no factor from 2^68 to 2^69
2009-04-14	curtisc	C-LL	7FEB09C1DE651A2C