4 297 457 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
64638588649499364599399	23	75.8	2022-08-08 09:38:29

ECM

Digits	B1	Curves
25	50000	12 / 280

Estimated T-Level: 20.2 ⓘ

TF below 2^62 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)	1998-04-11	John M. Drescher	DD6F7C6615636820	0
Verified (Factored)	2000-02-16	Sandro Menzel	DD6F7C6615636820	288171

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2022-08-10	LordJulius	9D6E46DE037A9E2D	1	3492492	5	3

P-1 factors

Date	Factor	B1	B2
2022-08-08	64638588649499364599399	6200000	35561477490

History

Date	User	Type	Result
2022-08-10	ag6if-jim	CERT	PRP Certification Proof certified good
2022-08-10	LordJulius	C-PRP	M4297457/64638588649499364599399 : 9D6E46DE037A9E2D PRP proof power = 7 PRP: Verified Proof certified good
2022-08-08	DRobinsonPE	F-PM1	Factor: 64638588649499364599399 / (P-1, B1=6200000, B2=35561477490)
2022-07-08	Kevin_9611	NF-PM1	B1=550000, B2=25850000
2021-01-24	-Anonymous-	NF	no factor from 2^70 to 2^71
2021-01-23	-Anonymous-	NF	no factor from 2^69 to 2^70
2021-01-23	-Anonymous-	NF	no factor from 2^68 to 2^69
2018-11-18	chuenkit	NF	no factor from 2^67 to 2^68
2018-04-27	chuenkit	NF	no factor from 2^66 to 2^67
2016-02-23	Mark Rose	NF	no factor from 2^61 to 2^63
2016-02-12	Squeeky_Squirrel	NF-PM1	B1=150000, B2=3600000, E=6
2015-06-13	snme2pm1	NF	no factor from 2^65 to 2^66
2014-08-21	Joss	NF-PM1	B1=64935
2014-05-18	lycorn	NF	no factor from 2^64 to 2^65
2014-05-05	Jayder	NF	no factor from 2^63 to 2^64
2012-02-03	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2011-07-04	USAFSS	NF-PM1	B1=50000, B2=775000, E=6
2009-08-08	Carsten Kossendey	NF-PM1	B1=20000, B2=275000