1 882 861 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
2701092139049	13	41.3	old
666990098678118344881	21	69.2	2020-08-17 12:16:23
4711109198452238778800497	25	82.0	2015-08-28 11:33:32

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)	2017-10-04	Oliver Kruse	4A6C1C5AFB7B0D48	2	0	1	3
Verified (Factored)	2017-11-08	ATH	4A6C1C5AFB7B0D48	2	248425	1	3
Verified	2020-08-17	M Miller	299021F74FE6EFB9	3	1683062	5	3
Verified	2020-08-17	atrench	299021F74FE6EFB9	3	158573	5	3

P-1 factors

Date	Factor	B1	B2
2015-08-28	4711109198452238778800497	500000	15000000

History

Date	User	Type	Result
2020-08-17	atrench	C-PRP	M1882861/2701092139049/666990098678118344881/4711109198452238778800497 : 299021F74FE6EFB9 PRP: Verified PRP without proof (not generated)
2020-08-17	Jorge Coveiro	CERT	PRP Certification Proof certified good
2020-08-17	M Miller	C-PRP	M1882861/2701092139049/4711109198452238778800497/666990098678118344881 : 299021F74FE6EFB9 PRP proof power = 7 PRP: Verified Proof certified good
2020-08-17	_p95holder_	F-ECM	Factor: 666990098678118344881 / (ECM curve 5, B1=50000, B2=5000000)
2017-11-08	ATH	C-PRP	M1882861/2701092139049/4711109198452238778800497 : 4A6C1C5AFB7B0D48 PRP: Verified PRP without proof (not generated)
2017-10-04	Oliver Kruse	C-PRP	M1882861/2701092139049/4711109198452238778800497 : 4A6C1C5AFB7B0D48 PRP: Verified PRP without proof (not generated)
2015-08-28	alpertron	F-PM1	Factor: 4711109198452238778800497 / (P-1, B1=500000, B2=15000000, E=12)