2 188 463 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
928088529359744230943	21	69.7	2017-11-04 09:10:06

ECM

Digits	B1	Curves
25	50000	103 / 280

Estimated T-Level: 21.8 ⓘ

TF below 2^68 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)	1997-12-30	Fumitaka Hayashi	D4E29FCB6FD66451	0
Verified (Factored)	1999-02-21	George Vilches	D4E29FCB6FD66451	1557312

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-11-05	Oliver Kruse	E139054665B73F1A	1	496945	5	3
Verified	2017-11-19	kkmrkkblmbrbk	E139054665B73F1A	1	667618	5	3

History

Date	User	Type	Result
2019-01-20	Joss	NF-PM1	B1=1000000, B2=10000000, E=12
2017-11-19	kkmrkkblmbrbk	C-PRP	M2188463/928088529359744230943 : E139054665B73F1A PRP: Verified PRP without proof (not generated)
2017-11-05	Oliver Kruse	C-PRP	M2188463/928088529359744230943 : E139054665B73F1A PRP: Verified PRP without proof (not generated)
2017-11-04	Conductor	F-ECM	Factor: 928088529359744230943 / (ECM curve 2, B1=50000, B2=5000000)
2016-11-24	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-02-23	Mark Rose	NF	no factor from 2^58 to 2^60
2016-02-13	Joss	NF-PM1	B1=442456, B2=4424560, E=6
2016-01-02	ramgeis	NF	no factor from 2^65 to 2^66
2015-03-25	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-03-25	VictordeHollander	NF	no factor from 2^63 to 2^64
2014-10-10	Joss	NF-PM1	B1=148656
2014-06-26	-Anonymous-	NF-PM1	B1=119328
2013-12-03	LaurV	NF	no factor from 2^62 to 2^63
2011-01-12	markr	NF-PM1	B1=90000, B2=1620000, E=6
2010-11-08	Joss	NF-PM1	B1=30000
2010-11-04	Joss	NF-PM1	B1=15000
2009-01-08	Sturle Sunde	NF	no factor from 2^61 to 2^62
2009-01-03	Sturle Sunde	NF	no factor from 2^60 to 2^61