1 863 583 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
655981217	9	29.3	old
168098659632645100049	21	67.2	2021-01-22 23:37:28

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	130 / 640

Estimated T-Level: 26.0 ⓘ

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	DE89657C8EB05D82	1	0	1	3
Verified (Factored)	2017-11-11	kkmrkkblmbrbk	DE89657C8EB05D82	1	723777	1	3
Verified	2021-01-23	mrh	B881C6A242ED7DE7	2	1217323	5	3

History

Date	User	Type	Result
2021-01-23	GAN	CERT	PRP Certification Proof certified good
2021-01-23	mrh	C-PRP	M1863583/655981217/168098659632645100049 : B881C6A242ED7DE7 PRP proof power = 7 PRP: Verified Proof certified good
2021-01-22	_p95holder_	F-ECM	Factor: 168098659632645100049 / (ECM curve 7, B1=50000, B2=5000000)
2017-11-11	kkmrkkblmbrbk	C-PRP	M1863583/655981217 : DE89657C8EB05D82 PRP: Verified (Factored) PRP without proof (not generated)
2017-10-04	Oliver Kruse	C-PRP	M1863583/655981217 : DE89657C8EB05D82 PRP: Verified (Factored) PRP without proof (not generated)
2016-03-16	alpertron	NF-PM1	B1=500000, B2=15000000, E=12