1 805 261 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
14442089	8	23.8	old
893499489863	12	39.7	2008-07-15 07:46:49
4236500744332774871959	22	71.8	2020-06-11 19:21:35

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	107 / 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)	2017-10-03	Oliver Kruse	0208540B9FF1C67F	2	0	1	3
Verified (Factored)	2017-11-11	kkmrkkblmbrbk	0208540B9FF1C67F	2	442068	1	3
Verified	2020-06-11	ATH	3B53D14D3632CDDD	3	1766738	5	3
Verified	2020-06-13	Team_Inspector	3B53D14D3632CDDD	3	1045245	5	3

History

Date	User	Type	Result
2020-06-13	Team_Inspector	C-PRP	M1805261/14442089/893499489863/4236500744332774871959 : 3B53D14D3632CDDD PRP: Verified PRP without proof (not generated)
2020-06-11	ATH	C-PRP	M1805261/14442089/893499489863/4236500744332774871959 : 3B53D14D3632CDDD PRP: Verified PRP without proof (not generated)
2020-06-11	nordi	F-ECM	Factor: 4236500744332774871959 / (ECM curve 2, B1=50000, B2=5000000, Sigma=2111851597694922)
2017-11-11	kkmrkkblmbrbk	C-PRP	M1805261/14442089/893499489863 : 0208540B9FF1C67F PRP: Verified PRP without proof (not generated)
2017-10-03	Oliver Kruse	C-PRP	M1805261/14442089/893499489863 : 0208540B9FF1C67F PRP: Verified PRP without proof (not generated)
2016-03-16	alpertron	NF-PM1	B1=500000, B2=15000000, E=12
2008-07-15	J Feitsma	F	Factor: 893499489863