1 346 311 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Composite, with 1 known prime factor. Cofactor is composite.

Factored

Factor	Digits	Bits	Date
11564989789911528426930833	26	83.3	2018-01-01 04:04:25

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	105 / 640

Estimated T-Level: 25.8 ⓘ

TF below 2^81 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Edo de Roo Jankovic	59FCBB1DC901DE09	0
Verified (Factored)		Cornelius Caesar	59FCBB1DC901DE09	0
Verified (Factored)		Brian J. Beesley	59FCBB1DC901DE09	1059054
Verified (Factored)	2016-06-02	MadPoo	59FCBB1DC901DE09	841946

Status	Date	User	Residue	Shift	Type	Base
Verified (Factored)	2025-09-01	Kriesel	4FD8C60CF2957658	0	1	3

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2018-01-02	Oliver Kruse	4FD8C60CF2957658	1	256842	5	3
Verified	2018-01-03	kkmrkkblmbrbk	4FD8C60CF2957658	1	34340	5	3

History

Date	User	Type	Result
2025-09-03	carel van der westhuizen	CERT	PRP Certification CERT proof power = 6 Proof certified good
2025-09-01	Kriesel	C-PRP	4FD8C60CF2957658 PRP proof power = 6 PRP: Verified (Factored) Proof certified good
2018-01-03	kkmrkkblmbrbk	C-PRP	M1346311/11564989789911528426930833 : 4FD8C60CF2957658 PRP: Verified PRP without proof (not generated)
2018-01-02	Oliver Kruse	C-PRP	M1346311/11564989789911528426930833 : 4FD8C60CF2957658 PRP: Verified PRP without proof (not generated)
2018-01-01	OS1	F-ECM	Factor: 11564989789911528426930833
2016-08-27	Bruno Victal	NF-PM1	B1=2500000, B2=62500000, E=12
2016-08-12	Bruno Victal	NF-PM1	B1=2500000, B2=62500000, E=12
2016-06-02	MadPoo	C-LL	59FCBB1DC901DE09
2016-02-23	Mark Rose	NF	no factor from 2^58 to 2^60
2015-09-17	ramgeis	NF	no factor from 2^65 to 2^66
2015-04-13	snme2pm1	NF	no factor from 2^64 to 2^65
2015-04-13	snme2pm1	NF	no factor from 2^63 to 2^64
2013-08-26	David Campeau	NF-PM1	B1=1350000, B2=39150000, E=12
2013-01-14	dbaugh	NF	no factor from 2^62 to 2^63
2011-05-09	megavink	NF	no factor from 2^61 to 2^62
2009-02-17	Sturle Sunde	NF	no factor from 2^60 to 2^61