2 378 617 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
7401462873805863914521	22	72.6	2020-07-16 11:33:16

ECM

Digits	B1	Curves
25	50000	67 / 280

Estimated T-Level: 21.2 ⓘ

TF below 2^65 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Peter Marksteiner	11E128C808ABF63C	0
Verified (Factored)	1999-03-26	Kent Lee	11E128C808ABF63C	1179771
Verified (Factored)	2018-05-14	kkmrkkblmbrbk	11E128C808ABF63C	1031393

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2020-07-16	M Miller	6B9A4A4C1D34AA5A	1	1873111	5	3
Verified	2020-07-16	oodaira	6B9A4A4C1D34AA5A	1	1919420	5	3

History

Date	User	Type	Result
2020-07-16	oodaira	C-PRP	M2378617/7401462873805863914521 : 6B9A4A4C1D34AA5A PRP: Verified PRP without proof (not generated)
2020-07-16	M Miller	C-PRP	M2378617/7401462873805863914521 : 6B9A4A4C1D34AA5A PRP: Verified PRP without proof (not generated)
2020-07-16	daveward2005	F-ECM	Factor: 7401462873805863914521 / (ECM curve 1, B1=50000, B2=5000000)
2019-03-25	TJAOI	NF	no factor from 2^67 to 2^68
2018-05-14	kkmrkkblmbrbk	C-LL	11E128C808ABF63C
2017-06-16	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
2015-10-31	ramgeis	NF	no factor from 2^65 to 2^66
2015-10-11	mikr	NF-PM1	B1=3000000, B2=100000000, E=12
2015-03-09	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-03-09	VictordeHollander	NF	no factor from 2^63 to 2^64
2014-09-10	Joss	NF-PM1	B1=126984
2013-01-23	dbaugh	NF	no factor from 2^62 to 2^63
2012-05-31	Sebastian Hornbostel	NF	no factor from 2^61 to 2^62
2010-12-28	markr	NF-PM1	B1=100000, B2=2050000, E=6
2010-11-15	Joss	NF-PM1	B1=20000
2010-11-07	Joss	NF-PM1	B1=15000
2009-01-14	Sturle Sunde	NF	no factor from 2^60 to 2^61