2 485 649 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
375906707694585052113529	24	78.3	2021-05-20 16:23:23

ECM

Digits	B1	Curves
25	50000	183 / 280

Estimated T-Level: 23.3 ⓘ

TF below 2^72 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Kenneth Pocek	8CD2E1D2275260F9	0
Verified (Factored)		Shattering Technologies	8CD2E1D2275260F9	0
Verified (Factored)	1999-05-09	Sam Robertson	8CD2E1D2275260F9	622671

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2021-05-20	riccardo uberti	76FB0D6479C53170	1	1719100	5	3

History

Date	User	Type	Result
2021-05-20	riccardo uberti	NF-PP1	Start=6/5, B1=2500000, B2=50000000
2021-05-20	riccardo uberti	NF-PP1	Start=2/7, B1=2500000, B2=50000000
2021-05-20	George Woltman	CERT	PRP Certification Proof certified good
2021-05-20	riccardo uberti	C-PRP	M2485649/375906707694585052113529 : 76FB0D6479C53170 PRP proof power = 7 PRP: Verified Proof certified good
2021-05-20	kutens	F-ECM	Factor: 375906707694585052113529 / (ECM curve 4, B1=50000, B2=5150000, Sigma=3663971301379592)
2019-06-10	TJAOI	NF	no factor from 2^67 to 2^68
2017-07-22	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
2015-10-30	ramgeis	NF	no factor from 2^65 to 2^66
2015-03-03	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-03-03	VictordeHollander	NF	no factor from 2^63 to 2^64
2014-11-13	mikr	NF-PM1	B1=2382500, B2=85770100, E=12
2014-09-03	Joss	NF-PM1	B1=120822
2013-12-04	Jerry Hallett	NF	no factor from 2^62 to 2^63
2012-06-10	Sebastian Hornbostel	NF	no factor from 2^61 to 2^62
2011-01-22	Oscar Östlin	NF-PM1	B1=95000, B2=1947500, E=6
2010-12-22	Joss	NF-PM1	B1=20000
2009-01-15	Sturle Sunde	NF	no factor from 2^60 to 2^61