61 615 787 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 2⁷⁶

TF target 2⁷⁴

P-1

B1 =	775000
B2 =	15887500

Status	Date	User	Residue	Shift
Verified	2014-07-20	curtisc	253960F9424165B0	50330585
Verified	2022-05-15	Sergey Nosov	253960F9424165B0	11100412

History

Date	User	Type	Result
2022-05-15	Sergey Nosov	C-LL	253960F9424165B0
2020-06-07	-Anonymous-	NF	no factor from 2^75 to 2^76
2019-09-09	Architects Cubed	NF-PM1	B1=775000, B2=15887500, E=12
2019-05-26	Sid & Andy	NF	no factor from 2^74 to 2^75
2016-02-23	Mark Rose	NF	no factor from 2^62 to 2^63
2014-07-20	curtisc	C-LL	253960F9424165B0
2014-05-28	chalsall	NF	no factor from 2^73 to 2^74
2013-04-23	-Anonymous-	NF-PM1	B1=695000
2013-02-09	Jerry Hallett	NF	no factor from 2^72 to 2^73
2013-02-09	Jerry Hallett	NF	no factor from 2^71 to 2^72
2012-05-04	Kyle Askine	NF	no factor from 2^70 to 2^71
2012-04-18	Stef42	NF	no factor from 2^69 to 2^70
2009-10-01	piero za	NF	no factor from 2^68 to 2^69
2009-09-28	piero za	NF	no factor from 2^67 to 2^68
2009-09-21	piero za	NF	no factor from 2^66 to 2^67
2009-04-08	bayanne	NF	no factor from 2^65 to 2^66
2009-04-07	bayanne	NF	no factor from 2^64 to 2^65
2009-04-06	Andrey Kurgannikov	NF	no factor from 2^63 to 2^64