1 853 801 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
11122807	8	23.4	old
22036740740790156497	20	64.3	2015-07-07 17:23:45
272057955679353506441	21	67.9	2015-07-07 17:23:44
663188023396082673867361	24	79.1	2020-11-21 00:21:10

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	106 / 640

Estimated T-Level: 25.8 ⓘ

TF below 2^81 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-10-05	Oliver Kruse	BC5120D5BEF7AADC	3	0	1	3
Verified (Factored)	2017-11-11	kkmrkkblmbrbk	BC5120D5BEF7AADC	3	991839	1	3
Verified	2020-11-21	rbanov	8CD016E5D66415EF	4	1118663	5	3

P-1 factors

Date	Factor	B1	B2
2015-07-07	272057955679353506441	500000	15000000
2015-07-07	22036740740790156497	500000	15000000

History

Date	User	Type	Result
2020-11-21	curtisc	CERT	PRP Certification Proof certified good
2020-11-21	rbanov	C-PRP	M1853801/11122807/272057955679353506441/22036740740790156497/663188023396082673867361 : 8CD016E5D66415EF PRP proof power = 7 PRP: Verified Proof certified good
2020-11-21	nordi	F-ECM	Factor: 663188023396082673867361 / (ECM curve 4, B1=50000, B2=5000000, Sigma=7511661306422966)
2017-11-11	kkmrkkblmbrbk	C-PRP	M1853801/11122807/22036740740790156497/272057955679353506441 : BC5120D5BEF7AADC PRP: Verified (Factored) PRP without proof (not generated)
2017-10-05	Oliver Kruse	C-PRP	M1853801/11122807/272057955679353506441/22036740740790156497 : BC5120D5BEF7AADC PRP: Verified (Factored) PRP without proof (not generated)
2017-10-04	Oliver Kruse	C-PRP	M1853801/11122807/272057955679353506441/22036740740790156497 : BC5120D5BEF7AADC PRP without proof (not generated)
2015-07-07	alpertron	F-PM1	Factor: 5995270635775292153490816328214087497177 / (P-1, B1=500000, B2=15000000, E=12)