2 538 427 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
1112882963098864567471	22	69.9	2012-11-23 04:16:23

ECM

Digits	B1	Curves
25	50000	145 / 280

Estimated T-Level: 22.6 ⓘ

TF below 2^70 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)	1997-11-29	Marco Voerman	A5BFE7DBDAED20C7	0
Verified (Factored)	1999-04-13	Matthias Müller	A5BFE7DBDAED20C7	2170127

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-14	Oliver Kruse	F2A17B53E0AE64D1	1	336430	5	3
Verified	2017-12-01	kkmrkkblmbrbk	F2A17B53E0AE64D1	1	955007	5	3

History

Date	User	Type	Result
2022-03-11	LordJulius	NF	no factor from 2^1 to 2^60
2019-07-04	alpertron	NF-PM1	B1=2000000, B2=60000000, E=12
2017-12-01	kkmrkkblmbrbk	C-PRP	M2538427/1112882963098864567471 : F2A17B53E0AE64D1 PRP: Verified PRP without proof (not generated)
2017-10-14	Oliver Kruse	C-PRP	M2538427/1112882963098864567471 : F2A17B53E0AE64D1 PRP: Verified PRP without proof (not generated)
2012-11-23	Torchwood Institute	F-ECM	Factor: 1112882963098864567471
2012-06-14	Sebastian Hornbostel	NF	no factor from 2^61 to 2^62
2011-04-03	James Heinrich	NF-PM1	B1=300000, B2=8000000, E=12
2011-01-07	Joss	NF-PM1	B1=50000
2011-01-02	Joss	NF-PM1	B1=30000
2010-12-19	Joss	NF-PM1	B1=20000
2009-02-03	Sturle Sunde	NF	no factor from 2^60 to 2^61