1 900 571 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
3801143	7	21.9	old
148592047567029613241	21	67.0	2021-01-03 18:40:28

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)	2017-10-04	Oliver Kruse	A08515958CFEF6E2	1	0	1	3
Verified (Factored)	2017-11-09	ATH	A08515958CFEF6E2	1	1808415	1	3
Verified	2021-01-04	mrh	AD113FF354010822	2	182434	5	3

History

Date	User	Type	Result
2021-01-04	Albrecht Heeffer	CERT	PRP Certification Proof certified good
2021-01-04	mrh	C-PRP	M1900571/3801143/148592047567029613241 : AD113FF354010822 PRP proof power = 7 PRP: Verified Proof certified good
2021-01-03	_p95holder_	F-ECM	Factor: 148592047567029613241 / (ECM curve 4, B1=50000, B2=5000000)
2017-11-09	ATH	C-PRP	M1900571/3801143 : A08515958CFEF6E2 PRP: Verified (Factored) PRP without proof (not generated)
2017-10-04	Oliver Kruse	C-PRP	M1900571/3801143 : A08515958CFEF6E2 PRP: Verified (Factored) PRP without proof (not generated)
2016-03-16	alpertron	NF-PM1	B1=500000, B2=15000000, E=12