61 656 211 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 =	585000
B2 =	11846250

Status	Date	User	Residue	Shift
Verified	2013-12-27	curtisc	9A433F9274208C4C	24137713
Verified	2022-05-22	Sergey Nosov	9A433F9274208C4C	28642317

History

Date	User	Type	Result
2022-05-22	Sergey Nosov	C-LL	9A433F9274208C4C
2020-06-09	-Anonymous-	NF	no factor from 2^75 to 2^76
2020-05-19	-Anonymous-	NF	no factor from 2^74 to 2^75
2016-03-04	-Anonymous-	NF	no factor from 2^73 to 2^74
2016-02-23	Mark Rose	NF	no factor from 2^62 to 2^63
2013-12-27	curtisc	C-LL	9A433F9274208C4C
2013-02-20	Massimo Cappelli (ik5pwa)	NF-PM1	B1=585000, B2=11846250
2013-02-14	Jerry Hallett	NF	no factor from 2^72 to 2^73
2013-02-11	kdgehman	NF	no factor from 2^71 to 2^72
2013-02-11	kdgehman	NF	no factor from 2^70 to 2^71
2011-11-19	-Anonymous-	NF	no factor from 2^69 to 2^70
2009-10-13	BranMuffin	NF	no factor from 2^68 to 2^69
2009-10-06	Sturle Sunde	NF	no factor from 2^67 to 2^68
2009-10-05	Sturle Sunde	NF	no factor from 2^66 to 2^67
2009-10-04	Nathan Edington	NF	no factor from 2^65 to 2^66
2009-07-24	unconnected	NF	no factor from 2^64 to 2^65
2009-04-17	markr	NF	no factor from 2^63 to 2^64