1 778 879 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
1298023774410263	16	50.2	old
4261695255175849109903	22	71.9	2020-09-26 14:59:46

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	CC1728879D7BD31E	1	0	1	3
Verified (Factored)	2017-11-10	kkmrkkblmbrbk	CC1728879D7BD31E	1	644215	1	3
Verified	2020-09-27	xyuzyz	B39CE7286B76A65D	2	1345740	5	3
Verified	2020-09-28	LOBES	B39CE7286B76A65D	2	815993	5	3

History

Date	User	Type	Result
2020-09-28	LOBES	C-PRP	M1778879/1298023774410263/4261695255175849109903 : B39CE7286B76A65D PRP: Verified PRP without proof (not generated)
2020-09-27	xyuzyz	C-PRP	M1778879/1298023774410263/4261695255175849109903 : B39CE7286B76A65D PRP: Verified PRP without proof (not generated)
2020-09-26	Massimo Cappelli (ik5pwa)	F-ECM	Factor: 4261695255175849109903 / (ECM curve 3, B1=50000, B2=5000000, Sigma=6871148748893426)
2017-11-10	kkmrkkblmbrbk	C-PRP	M1778879/1298023774410263 : CC1728879D7BD31E PRP: Verified PRP without proof (not generated)
2017-10-03	Oliver Kruse	C-PRP	M1778879/1298023774410263 : CC1728879D7BD31E PRP: Verified PRP without proof (not generated)
2016-03-16	alpertron	NF-PM1	B1=500000, B2=15000000, E=12