79 240 277 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 2⁷⁶

TF target 2⁷⁵

P-1

B1 =	651000
B2 =	464100780

Status	Date	User	Residue	Shift
Verified	2018-05-13	curtisc	84312B8515A6AABA	47139476
Verified	2025-09-15	0x	84312B8515A6AABA	29880492

History

Date	User	Type	Result
2025-09-15	0x	C-LL	84312B8515A6AABA
2025-09-13	ElectricBill	NF-PM1	B1=651000, B2=464100780
2025-08-03	ElectricBill	NF	no factor from 2^75 to 2^76
2018-05-13	curtisc	C-LL	84312B8515A6AABA
2016-08-07	Jwb52z	NF-PM1	B1=665000, B2=12635000
2016-07-22	AirSquirrels	NF	no factor from 2^74 to 2^75
2016-07-22	AirSquirrels	NF	no factor from 2^73 to 2^74
2016-07-22	AirSquirrels	NF	no factor from 2^72 to 2^73
2016-04-05	Mark Rose	NF	no factor from 2^64 to 2^65
2016-04-04	Mark Rose	NF	no factor from 2^63 to 2^64
2016-02-20	Derek	NF	no factor from 2^71 to 2^72
2013-01-23	phoenicis	NF	no factor from 2^70 to 2^71
2011-01-23	Robert M.	NF	no factor from 2^69 to 2^70
2011-01-17	BlackburnCode	NF	no factor from 2^68 to 2^69
2011-01-16	JMGarcia	NF	no factor from 2^67 to 2^68
2011-01-15	-Anonymous-	NF	no factor from 2^66 to 2^67
2011-01-15	-Anonymous-	NF	no factor from 2^65 to 2^66