79 367 581 Exponent Status

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

PrimeNet Exponent Status

M_n

Details

Composite: proven not-prime with Lucas-Lehmer test

No factors below 2⁷⁶

TF target 2⁷⁵

P-1

B1 =	665000
B2 =	13133750

Status	Date	User	Residue	Shift	Software
Verified	2018-05-06	Will Edgington	5D40AC5BA3253542	20669860	Windows 64-bit,Prime95,v29.4,build 8
Verified	2025-11-29	Ra1nb0w	5D40AC5BA3253542	28796062	Windows 64-bit,Prime95,v30.19,build 20

History

Date	User	Type	Result
2025-11-29	Ra1nb0w	C-LL	5D40AC5BA3253542
2025-08-18	ElectricBill	NF	no factor TF: 75-76
2018-05-06	Will Edgington	C-LL	5D40AC5BA3253542
2016-09-17	Brian Beuning	NF-PM1	B1=665000, B2=13133750, E=6
2016-08-05	AirSquirrels	NF	no factor TF: 74-75
2016-08-05	AirSquirrels	NF	no factor TF: 73-74
2016-08-03	RichD0	NF	no factor TF: 72-73
2016-02-24	Andrew B	NF	no factor TF: 71-72
2013-05-26	Eric_Kaiser	NF	no factor TF: 70-71
2013-02-01	NoWhereMan	NF	no factor TF: 69-70
2013-01-29	NoWhereMan	NF	no factor TF: 68-69
2012-10-08	Axelsson	NF	no factor TF: 67-68
2011-06-02	Carsten Kossendey	NF	no factor TF: 66-67
2010-11-21	GrunwalderGIMP	NF	no factor TF: 65-66
2009-07-15	Patrik Johansson	NF	no factor TF: 64-65
2009-05-30	Architects Cubed	NF	no factor TF: 63-64