78 805 451 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Composite: proven not-prime with Lucas-Lehmer test

TF

No factors below 2⁷⁵

TF target 2⁷⁵

P-1

B1 =	680000
B2 =	13260000

Status	Date	User	Residue	Shift
Verified	2017-12-20	curtisc	8BB8ED76A174136B	40245136
Bad	2024-11-14	Nelprat	F05EB7C57D8CC9EA	59863593
Verified	2024-11-28	MadPoo	8BB8ED76A174136B	44609166

History

Date	User	Type	Result
2024-11-28	MadPoo	C-LL	8BB8ED76A174136B
2024-11-14	Nelprat	C-LL	F05EB7C57D8CC9EA
2017-12-20	curtisc	C-LL	8BB8ED76A174136B
2016-07-30	Kevin Jaget	NF-PM1	B1=680000, B2=13260000, E=6
2016-06-30	dh1	NF	no factor from 2^74 to 2^75
2016-06-30	dh1	NF	no factor from 2^73 to 2^74
2016-06-30	hiner112	NF	no factor from 2^72 to 2^73
2016-02-05	Andrew B	NF	no factor from 2^71 to 2^72
2013-02-11	Clown_Royal	NF	no factor from 2^70 to 2^71
2011-02-12	searchingforprimes	NF	no factor from 2^69 to 2^70
2011-02-03	-Anonymous-	NF	no factor from 2^68 to 2^69
2011-02-02	dsl	NF	no factor from 2^67 to 2^68
2011-01-31	-Anonymous-	NF	no factor from 2^66 to 2^67
2011-01-31	Jeff Palmer	NF	no factor from 2^65 to 2^66
2011-01-31	-Anonymous-	NF	no factor from 2^64 to 2^65