79 267 843 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Tested as composite (unverified): unconfirmed Lucas-Lehmer test says not-prime

TF

No factors below 2⁷⁶

TF target 2⁷⁵

P-1

B1 =	665000
B2 =	12967500

Status	Date	User	Residue	Shift
Unverified	2018-04-23	Strolling Jellyfish	FCD3966E2A3031__	62367366

Assigned

Assigned	User	Work Type	Stage	% Done	Updated	Expired
2025-09-22	Dt12	LL double-check	LL	15.47 %	2025-10-06

History

Date	User	Type	Result
2025-08-06	ElectricBill	NF	no factor from 2^75 to 2^76
2018-04-23	Strolling Jellyfish	C-LL	FCD3966E2A3031__
2016-09-03	M.A.G.	NF-PM1	B1=665000, B2=12967500
2016-08-07	Brian Beuning	NF	no factor from 2^74 to 2^75
2016-08-07	Brian Beuning	NF	no factor from 2^73 to 2^74
2016-07-22	CacheOut	NF	no factor from 2^72 to 2^73
2016-03-08	ixfd64	NF	no factor from 2^71 to 2^72
2014-08-02	Andres Aitsen	NF	no factor from 2^70 to 2^71
2012-04-07	Matthew Sheasby	NF	no factor from 2^69 to 2^70
2011-04-18	Avernon	NF	no factor from 2^68 to 2^69
2011-01-20	Deltron	NF	no factor from 2^67 to 2^68
2011-01-18	-Anonymous-	NF	no factor from 2^66 to 2^67
2011-01-16	runesk	NF	no factor from 2^65 to 2^66