2 648 207 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
23958903292561292392177	23	74.3	2020-07-14 16:31:28

ECM

Digits	B1	Curves
25	50000	35 / 280

Estimated T-Level: 20.6 ⓘ

TF below 2^64 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		fred	3620F98D92F7D759	0
Verified (Factored)	1999-04-13	Ethan O'Connor	3620F98D92F7D759	1637824
Verified (Factored)	2018-07-16	kkmrkkblmbrbk	3620F98D92F7D759	555854

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2020-07-15	pew	FBB928DBE4581003	1	514164	5	3
Verified	2020-07-15	oodaira	FBB928DBE4581003	1	2442013	5	3

History

Date	User	Type	Result
2020-07-15	oodaira	C-PRP	M2648207/23958903292561292392177 : FBB928DBE4581003 PRP: Verified PRP without proof (not generated)
2020-07-15	pew	C-PRP	M2648207/23958903292561292392177 : FBB928DBE4581003 PRP: Verified PRP without proof (not generated)
2020-07-14	MarkS	F-ECM	Factor: 23958903292561292392177 / (ECM curve 2, B1=50000, B2=5000000, Sigma=8216092358910113)
2019-11-29	masser	NF-PM1	B1=2000000, B2=50000000, E=12
2019-02-18	TJAOI	NF	no factor from 2^67 to 2^68
2018-07-16	kkmrkkblmbrbk	C-LL	3620F98D92F7D759
2017-09-08	Gordon Spence	NF	no factor from 2^66 to 2^67
2017-05-08	Joss	NF-PM1	B1=360000, B2=3600000, E=6
2016-12-29	Joss	NF-PM1	B1=206385
2016-12-27	Joss	NF-PM1	B1=171988
2016-02-23	Mark Rose	NF	no factor from 2^59 to 2^60
2016-01-21	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
2013-01-23	dbaugh	NF	no factor from 2^62 to 2^63
2012-06-10	markr	NF	no factor from 2^61 to 2^62
2011-01-17	James Heinrich	NF-PM1	B1=180000, B2=4275000, E=6
2009-06-22	USAFSS	NF-PM1	B1=30000, B2=420000
2009-01-30	Sturle Sunde	NF	no factor from 2^60 to 2^61