2 287 591 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Composite: 3 known prime factors

Factored

Factor	Digits	Bits	Date
14121070570320612799	20	63.6	2017-03-27 11:15:37
9157522879807559214329	22	73.0	2012-01-08 12:39:30
52246353154407328026641	23	75.5	2025-10-21 10:57:36

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	124 / 640

Estimated T-Level: 26.0 ⓘ

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

Status	Date	User	Residue	Shift
Bad		John Lloyd	F85AA61FF3377323	0
Verified (Factored)	1999-03-15	Sam Robertson	A87CDCBBD1A06DDC	1318327
Verified (Factored)	2000-03-28	Gordon M. Spence	A87CDCBBD1A06DDC	2222580

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-10-11	Oliver Kruse	30942050A9F07CF0	1	0	1	3
Verified (Factored)	2017-10-18	Oliver Kruse	AA0EB431C4B667E3	2	1115762	5	3
Verified (Factored)	2017-11-22	kkmrkkblmbrbk	AA0EB431C4B667E3	2	441094	5	3

History

Date	User	Type	Result
2025-10-21	TJAOI	F-ECM	Factor: 52246353154407328026641 / (ECM curve 11, B1=250000, B2=264647565, Edwards Sigma=5919593823104379)
2022-03-09	LordJulius	NF	no factor from 2^62 to 2^63
2022-03-09	LordJulius	NF	no factor from 2^61 to 2^62
2017-11-22	kkmrkkblmbrbk	C-PRP	M2287591/9157522879807559214329/14121070570320612799 : AA0EB431C4B667E3 PRP: Verified (Factored) PRP without proof (not generated)
2017-10-18	Oliver Kruse	C-PRP	M2287591/9157522879807559214329/14121070570320612799 : AA0EB431C4B667E3 PRP: Verified (Factored) PRP without proof (not generated)
2017-10-11	Oliver Kruse	C-PRP	M2287591/known_factors : 30942050A9F07CF0 PRP: Verified (Factored) PRP without proof (not generated)
2017-03-27	TJAOI	F	Factor: 14121070570320612799 / TF: 63-64
2016-04-18	alpertron	NF-PM1	B1=500000, B2=15000000, E=12
2012-01-08	Squeeky_Squirrel	F-PM1	Factor: 9157522879807559214329
2011-01-18	Joss	NF-PM1	B1=50000
2009-01-11	Sturle Sunde	NF	no factor from 2^60 to 2^61