1 842 779 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
1242033047	10	30.2	old
1855608427399	13	40.8	2008-07-15 07:47:17
428231121391773943	18	58.6	2015-09-15 11:39:29
6067832966295855252143	22	72.4	2021-03-01 06:15:46

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)	2017-09-30	alpertron	55E40B6D603299C8	3	0	1	3
Verified (Factored)	2017-10-19	Oliver Kruse	55E40B6D603299C8	3	1731014	1	3
Verified	2021-03-02	Kriesel	5CE1217FEF83A6CA	4	1415699	5	3

History

Date	User	Type	Result
2022-04-03	Joss	NF-PM1	B1=1000000, B2=188329050
2021-03-02	wadjsngigi	CERT	PRP Certification Proof certified good
2021-03-02	Kriesel	C-PRP	M1842779/1242033047/1855608427399/428231121391773943/6067832966295855252143 : 5CE1217FEF83A6CA PRP proof power = 7 PRP: Verified Proof certified good
2021-03-01	MarkS	F-ECM	Factor: 6067832966295855252143 / (ECM curve 2, B1=50000, B2=5000000, Sigma=6510211157819993)
2017-10-19	Oliver Kruse	C-PRP	M1842779/1242033047/1855608427399/428231121391773943 : 55E40B6D603299C8 PRP: Verified (Factored) PRP without proof (not generated)
2017-09-30	alpertron	C-PRP	M1842779/1242033047/1855608427399/428231121391773943 : 55E40B6D603299C8 PRP: Verified (Factored) PRP without proof (not generated)
2015-09-15	TJAOI	F	Factor: 428231121391773943 / TF: 58-59
2008-07-15	J Feitsma	F	Factor: 1855608427399