1 838 423 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
3676847	7	21.8	old
2458254668143	13	41.2	2008-07-15 07:47:15
1994594243123887	16	50.8	2014-06-10 11:28:09
230213760093827396759	21	67.6	2020-11-24 09:40:03

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	109 / 640

Estimated T-Level: 25.9 ⓘ

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	A0F120BDA8F141F2	3	0	1	3
Verified (Factored)	2017-11-11	kkmrkkblmbrbk	A0F120BDA8F141F2	3	906208	1	3
Verified	2020-11-24	riccardo uberti	750BFD1F862B29F0	4	1391579	5	3

History

Date	User	Type	Result
2020-11-24	Simon Josefsson	CERT	PRP Certification Proof certified good
2020-11-24	riccardo uberti	C-PRP	M1838423/3676847/2458254668143/1994594243123887/230213760093827396759 : 750BFD1F862B29F0 PRP proof power = 7 PRP: Verified Proof certified good
2020-11-24	_p95holder_	F-ECM	Factor: 230213760093827396759 / (ECM curve 2, B1=50000, B2=5000000)
2017-11-11	kkmrkkblmbrbk	C-PRP	M1838423/3676847/2458254668143/1994594243123887 : A0F120BDA8F141F2 PRP: Verified (Factored) PRP without proof (not generated)
2017-10-04	Oliver Kruse	C-PRP	M1838423/3676847/2458254668143/1994594243123887 : A0F120BDA8F141F2 PRP: Verified (Factored) PRP without proof (not generated)
2016-03-16	alpertron	NF-PM1	B1=500000, B2=15000000, E=12
2014-06-10	TJAOI	F	Factor: 1994594243123887
2008-07-15	J Feitsma	F	Factor: 2458254668143