1 884 907 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
662157358970796452959836593	27	89.1	2016-07-11 16:30:10

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
Verified (Factored)		Don Sandstrom	012F34B98A5BA97B	0
Verified (Factored)	1998-12-21	Kent Lee	012F34B98A5BA97B	878739
Verified (Factored)	2015-07-06	MadPoo	012F34B98A5BA97B	266289

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-04	Oliver Kruse	8B47F60FECBB401C	1	0	1	3
Verified	2017-11-08	kkmrkkblmbrbk	8B47F60FECBB401C	1	930870	1	3

History

Date	User	Type	Result
2017-11-08	kkmrkkblmbrbk	C-PRP	M1884907/662157358970796452959836593 : 8B47F60FECBB401C PRP: Verified PRP without proof (not generated)
2017-10-04	Oliver Kruse	C-PRP	M1884907/662157358970796452959836593 : 8B47F60FECBB401C PRP: Verified PRP without proof (not generated)
2016-07-11	bam	F-ECM	Factor: 662157358970796452959836593 / (ECM curve 3, B1=50000, B2=5000000)
2016-02-23	Mark Rose	NF	no factor from 2^58 to 2^60
2016-02-23	Mark Rose	NF	no factor from 2^62 to 2^63
2016-02-23	Mark Rose	NF	no factor from 2^61 to 2^62
2015-10-07	Bruno Victal	NF-PM1	B1=500000, B2=15000000, E=12
2015-09-13	ramgeis	NF	no factor from 2^65 to 2^66
2015-07-06	MadPoo	C-LL	012F34B98A5BA97B
2015-05-09	snme2pm1	NF	no factor from 2^64 to 2^65
2015-05-09	snme2pm1	NF	no factor from 2^63 to 2^64
2012-01-16	markr	NF-PM1	B1=275000, B2=6000000, E=12
2011-03-08	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2010-04-01	Architects Cubed	NF	no factor from 2^60 to 2^61