1 907 371 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
11158339414813324927	20	63.3	2013-11-24 14:56:44

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	106 / 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
Bad		Alex and Nick Myrman	AA74	0
Verified (Factored)		David Underbakke	2F8B5B75B5ACAA73	0
Verified (Factored)	2002-05-25	S57483	2F8B5B75B5ACAA73	572627

Status	Date	User	Residue	Shift	Type	Base
Verified (Factored)	2025-09-02	Kriesel	F7B5FBD5422DB9BD	0	1	3

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-04	Oliver Kruse	4836E39D2CF3805B	1	0	1	3
Verified	2017-11-09	kkmrkkblmbrbk	4836E39D2CF3805B	1	339151	1	3

History

Date	User	Type	Result
2025-09-03	Carlos Pinho	CERT	PRP Certification CERT proof power = 6 Proof certified good
2025-09-02	Kriesel	C-PRP	F7B5FBD5422DB9BD PRP proof power = 6 PRP: Verified (Factored) Proof certified good
2017-11-09	kkmrkkblmbrbk	C-PRP	M1907371/11158339414813324927 : 4836E39D2CF3805B PRP: Verified PRP without proof (not generated)
2017-10-04	Oliver Kruse	C-PRP	M1907371/11158339414813324927 : 4836E39D2CF3805B PRP: Verified PRP without proof (not generated)
2016-03-16	alpertron	NF-PM1	B1=500000, B2=15000000, E=12
2013-11-24	Sara	F-ECM	Factor: 11158339414813324927
2011-06-05	kurly	NF-PM1	B1=1000000, B2=30000000, E=12
2011-02-19	GrunwalderGIMP	NF	no factor from 2^62 to 2^63
2011-02-19	GrunwalderGIMP	NF	no factor from 2^61 to 2^62
2009-05-25	Architects Cubed	NF	no factor from 2^60 to 2^61