12 738 367 Exponent Status

Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

M_n

Details

Composite, with 7 known prime factors. Cofactor is composite.

Trial Factored to 2⁶⁹

TF target 2⁶⁸

Factored

Factor	Digits	Bits	Date
127383671	9	26.9	old
203813873	9	27.6	2008-09-08 08:38:03
611441617	9	29.2	2008-09-08 08:38:03
62265137897	11	35.9	2008-09-08 08:38:03
4627084429081	13	42.1	2013-12-16 13:33:20
105990346925521	15	46.6	2014-02-14 15:55:57
3199657969113876791	19	61.5	2015-02-12 19:42:41

Status	Proof	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	PRP without proof (not generated)	2020-06-11	Jaytholomew	BC211CEBD7E27403	7	7923811	5	3
Verified	Certified Good	2021-03-14	ViliamF	BC211CEBD7E27403	7	10552953	5	3

History

Date	User	Type	Result
2022-05-05	nordi	NF-PM1	B1=400000, B2=428459850
2022-05-05	nordi	NF-PM1	B1=400000
2022-04-10	LordJulius	NF	no factor TF: 65-66
2022-04-10	LordJulius	NF	no factor TF: 64-65
2022-04-10	LordJulius	NF	no factor TF: 62-64
2021-03-14	ky0uraku	CERT	Proof certified good
2021-03-14	ViliamF	C-PRP	Proof Certified Good Proof Power: 8
2020-06-11	Jaytholomew	C-PRP	M12738367/127383671/203813873/611441617/62265137897/4627084429081/105990346925521/3199657969113876791 : BC211CEBD7E27403
2019-12-22	Seth_Tr	NF	no factor TF: 68-69
2019-06-20	Seth_Tr	NF	no factor TF: 67-68
2019-06-18	Seth_Tr	NF	no factor TF: 66-67
2015-02-12	pdazzl	F	Factor: 3199657969113876791 / TF: 61-62
2014-02-14	TJAOI	F	Factor: 105990346925521
2013-12-16	TJAOI	F	Factor: 4627084429081
2008-09-08	Will Edgington	F	Factor: 62265137897
2008-09-08	Will Edgington	F	Factor: 611441617
2008-09-08	Will Edgington	F	Factor: 203813873