1 857 671 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
3715343	7	21.8	old
2395828316722073	16	51.1	2014-06-17 11:47:31
3921223347135641910510401	25	81.7	2020-06-25 06:17:45

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	F1521418EABB0CB6	2	0	1	3
Verified (Factored)	2017-11-07	kkmrkkblmbrbk	F1521418EABB0CB6	2	920031	1	3
Verified	2020-06-25	M Miller	869A27E1A1C40502	3	493962	5	3
Verified	2020-06-27	arnaud	869A27E1A1C40502	3	308571	5	3

History

Date	User	Type	Result
2020-06-27	arnaud	C-PRP	M1857671/3715343/2395828316722073/3921223347135641910510401 : 869A27E1A1C40502 PRP: Verified PRP without proof (not generated)
2020-06-25	M Miller	C-PRP	M1857671/3715343/2395828316722073/3921223347135641910510401 : 869A27E1A1C40502 PRP: Verified PRP without proof (not generated)
2020-06-25	_p95holder_	F-ECM	Factor: 3921223347135641910510401 / (ECM curve 2, B1=50000, B2=5000000)
2017-11-07	kkmrkkblmbrbk	C-PRP	M1857671/3715343/2395828316722073 : F1521418EABB0CB6 PRP: Verified PRP without proof (not generated)
2017-10-04	Oliver Kruse	C-PRP	M1857671/3715343/2395828316722073 : F1521418EABB0CB6 PRP: Verified PRP without proof (not generated)
2016-03-16	alpertron	NF-PM1	B1=500000, B2=15000000, E=12
2014-06-17	TJAOI	F	Factor: 2395828316722073