4 030 357 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
307255907312376282607943	24	78.0	2021-06-09 02:37:55

ECM

Digits	B1	Curves
25	50000	57 / 280

Estimated T-Level: 21.0 ⓘ

TF below 2^65 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Ken Lord	E5D6BFEA498AC993	0
Verified (Factored)	1999-11-04	Stephan Grupp	E5D6BFEA498AC993	1462856

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2021-06-10	kutens	C433444B58569D23	1	64168	5	3

P-1 factors

Date	Factor	B1	B2
2023-05-27	307255907312376282607943	600000	417292590

History

Date	User	Type	Result
2023-05-27	USAFSS	F-PM1	Factor: 307255907312376282607943 / (P-1, B1=600000, B2=417292590)
2021-06-10	ky0uraku	CERT	PRP Certification Proof certified good
2021-06-10	kutens	C-PRP	M4030357/307255907312376282607943 : C433444B58569D23 PRP proof power = 7 PRP: Verified Proof certified good
2021-06-09	ATH	F-PP1	Start=2/7, B1=2500000, B2=177500000, Factor: 307255907312376282607943
2020-01-17	mikr	NF	no factor from 2^69 to 2^70
2020-01-17	mikr	NF	no factor from 2^68 to 2^69
2018-10-18	Yxinity	NF	no factor from 2^67 to 2^68
2018-10-17	mikr	NF	no factor from 2^67 to 2^68
2016-11-19	Ismo Laitela	NF-PM1	B1=2189464, B2=63494458, E=12
2016-09-06	kkmrkkblmbrbk	NF	no factor from 2^66 to 2^67
2016-02-23	Mark Rose	NF	no factor from 2^61 to 2^63
2015-05-19	snme2pm1	NF	no factor from 2^65 to 2^66
2013-11-18	David Campeau	NF	no factor from 2^64 to 2^65
2013-08-07	Jayder	NF	no factor from 2^63 to 2^64
2013-06-29	Squeeky_Squirrel	NF-PM1	B1=120000, B2=2310000, E=6
2009-11-25	USAFSS	NF-PM1	B1=40000, B2=610000, E=4
2009-11-14	GrunwalderGIMP	NF	no factor from 2^1 to 2^63