2 481 887 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Composite, with 2 known prime factors. Cofactor is composite.

Factored

Factor	Digits	Bits	Date
96411860207801934503	20	66.4	2014-11-03 15:42:43
116403203821821920857561	24	76.6	2024-03-09 15:36:58

ECM

Digits	B1	Curves
25	50000	162 / 280

Estimated T-Level: 22.9 ⓘ

TF below 2^71 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Jean Labelle	CEDEE32F543F3292	0
Verified (Factored)	1999-05-23	Stephen Wood	CEDEE32F543F3292	21457

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-10-14	Oliver Kruse	4E1D4C1CA5B36D3F	1	1098292	5	3
Verified (Factored)	2017-11-30	kkmrkkblmbrbk	4E1D4C1CA5B36D3F	1	1353599	5	3
Verified	2024-03-09	Ahmed Azhad	4E1D4C1CA5B36D3F	2	1018997	5	3

P-1 factors

Date	Factor	B1	B2
2014-11-03	96411860207801934503	2382500	85770100

History

Date	User	Type	Result
2024-03-09	Verplung	CERT	PRP Certification Proof certified good
2024-03-09	Ahmed Azhad	C-PRP	M2481887/96411860207801934503/116403203821821920857561 : 4E1D4C1CA5B36D3F PRP proof power = 7 PRP: Verified Proof certified good
2024-03-09	Ahmed Azhad	F-ECM	Factor: 116403203821821920857561 / (ECM curve 32, B1=50000, B2=60054225, Edwards Sigma=3981578151256816)
2022-03-10	LordJulius	NF	no factor from 2^1 to 2^60
2017-11-30	kkmrkkblmbrbk	C-PRP	M2481887/96411860207801934503 : 4E1D4C1CA5B36D3F PRP: Verified (Factored) PRP without proof (not generated)
2017-10-14	Oliver Kruse	C-PRP	M2481887/96411860207801934503 : 4E1D4C1CA5B36D3F PRP: Verified (Factored) PRP without proof (not generated)
2014-11-03	mikr	F-PM1	Factor: 96411860207801934503 / (P-1, B1=2382500, B2=85770100, E=12)
2014-09-02	Joss	NF-PM1	B1=120861
2013-01-23	dbaugh	NF	no factor from 2^62 to 2^63
2012-06-10	Sebastian Hornbostel	NF	no factor from 2^61 to 2^62
2011-01-21	Oscar Östlin	NF-PM1	B1=95000, B2=1947500, E=6
2010-11-20	Joss	NF-PM1	B1=20000
2009-01-14	Sturle Sunde	NF	no factor from 2^60 to 2^61