4 650 851 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
2438399185091436548860309538714332532921	40	130.8	2018-01-24 22:40:42

ECM

Digits	B1	Curves
25	50000	9 / 280

Estimated T-Level: 20.2 ⓘ

TF below 2^62 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)	1998-04-27	Matt Jarchow	5C7DAE2B1872FDA4	0
Verified (Factored)	2001-10-20	Fairholme College	5C7DAE2B1872FDA4	3616208

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2018-01-25	Netanias	EAD1D0E17C59346C	1	475952	5	3
Verified	2018-01-26	kkmrkkblmbrbk	EAD1D0E17C59346C	1	2347908	5	3

P-1 factors

Date	Factor	B1	B2
2018-01-24	2438399185091436548860309538714332532921	1988203	61634303

History

Date	User	Type	Result
2018-01-26	kkmrkkblmbrbk	C-PRP	M4650851/2438399185091436548860309538714332532921 : EAD1D0E17C59346C PRP: Verified PRP without proof (not generated)
2018-01-25	Netanias	C-PRP	M4650851/2438399185091436548860309538714332532921 : EAD1D0E17C59346C PRP: Verified PRP without proof (not generated)
2018-01-24	Ismo Laitela	F-PM1	Factor: 2438399185091436548860309538714332532921 / (P-1, B1=1988203, B2=61634303, E=12)
2016-02-23	Mark Rose	NF	no factor from 2^62 to 2^63
2015-07-07	snme2pm1	NF	no factor from 2^65 to 2^66
2015-02-04	monst	NF	no factor from 2^64 to 2^65
2015-02-03	Jayder	NF	no factor from 2^63 to 2^64
2012-02-07	Squeeky_Squirrel	NF-PM1	B1=110000, B2=2090000, E=6
2011-12-09	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2010-07-21	markr	NF	no factor from 2^61 to 2^62