2 541 703 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
19876917094504844483607443516743	32	104.0	2018-09-08 14:16:26

ECM

Digits	B1	Curves
25	50000	30 / 280

Estimated T-Level: 20.5 ⓘ

TF below 2^63 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Thomas Honold	E49EC685D0CE6EB9	0
Verified (Factored)	1999-05-16	Stephan Grupp	E49EC685D0CE6EB9	1384607
Verified (Factored)	2018-06-10	kkmrkkblmbrbk	E49EC685D0CE6EB9	740172

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2018-09-10	_p95holder_	F6A72D37468816E4	1	569162	5	3
Verified	2018-09-11	trebor	F6A72D37468816E4	1	1125635	5	3

P-1 factors

Date	Factor	B1	B2
2018-09-08	19876917094504844483607443516743	3000000	135000000

History

Date	User	Type	Result
2018-09-11	trebor	C-PRP	M2541703/19876917094504844483607443516743 : F6A72D37468816E4 PRP: Verified PRP without proof (not generated)
2018-09-10	_p95holder_	C-PRP	M2541703/19876917094504844483607443516743 : F6A72D37468816E4 PRP: Verified PRP without proof (not generated)
2018-09-08	mikr	F-PM1	Factor: 19876917094504844483607443516743 / (P-1, B1=3000000, B2=135000000, E=12)
2018-08-11	Joss	NF-PM1	B1=600000, B2=6000000, E=6
2018-06-10	kkmrkkblmbrbk	C-LL	E49EC685D0CE6EB9
2017-08-08	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-02-23	Mark Rose	NF	no factor from 2^59 to 2^60
2015-11-08	ramgeis	NF	no factor from 2^65 to 2^66
2015-02-23	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-02-23	VictordeHollander	NF	no factor from 2^63 to 2^64
2013-01-14	dbaugh	NF	no factor from 2^62 to 2^63
2012-06-15	Sebastian Hornbostel	NF	no factor from 2^61 to 2^62
2011-04-08	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
2009-01-27	Sturle Sunde	NF	no factor from 2^60 to 2^61