2 639 149 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
298909141106660602937	21	68.0	2020-11-23 10:21:14

ECM

Digits	B1	Curves
25	50000	71 / 280

Estimated T-Level: 21.3 ⓘ

TF below 2^66 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Bruce Bailey	C9791FA14C5F8272	0
Verified (Factored)	1999-04-23	Jeff Malick	C9791FA14C5F8272	612075
Verified (Factored)	2018-07-12	kkmrkkblmbrbk	C9791FA14C5F8272	116400

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2020-11-24	rbanov	F4202802905F101A	1	2302052	5	3

History

Date	User	Type	Result
2020-11-24	curtisc	CERT	PRP Certification Proof certified good
2020-11-24	rbanov	C-PRP	M2639149/298909141106660602937 : F4202802905F101A PRP proof power = 7 PRP: Verified Proof certified good
2020-11-23	rextherunt	F-ECM	Factor: 298909141106660602937 / (ECM curve 2, B1=50000, B2=5000000)
2019-11-04	masser	NF-PM1	B1=2640000, B2=26400000, E=12
2019-03-11	TJAOI	NF	no factor from 2^67 to 2^68
2018-07-12	kkmrkkblmbrbk	C-LL	C9791FA14C5F8272
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
2016-12-27	Joss	NF-PM1	B1=206385
2016-12-26	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
2013-01-14	dbaugh	NF	no factor from 2^62 to 2^63
2012-06-11	Grant McCracken	NF	no factor from 2^61 to 2^62
2011-01-17	James Heinrich	NF-PM1	B1=180000, B2=4320000, E=6
2009-06-21	USAFSS	NF-PM1	B1=30000, B2=420000
2009-01-27	Sturle Sunde	NF	no factor from 2^60 to 2^61