672 151 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
6371270358962852152708374071	28	92.4	2021-02-25 13:24:35

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	205 / 640

Estimated T-Level: 26.6 ⓘ

TF below 2^83 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		David Slowinski	99C	0
Verified (Factored)		Ken Kriesel	71F0F7B9A463499C	0
Verified (Factored)	2002-09-22	Dennis Pope	71F0F7B9A463499C	12303
Verified (Factored)	2015-04-11	MadPoo	71F0F7B9A463499C	148778

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2021-02-25	mrh	4439E02652668066	1	644101	5	3

History

Date	User	Type	Result
2022-03-07	LordJulius	NF	no factor from 2^54 to 2^55
2021-07-12	ATH	NF-PP1	Start=2/7, B1=5000000, B2=415000000
2021-07-11	George Woltman	NF-PP1	Start=2/7, B1=6250000, B2=475000000
2021-02-25	curtisc	CERT	PRP Certification Proof certified good
2021-02-25	mrh	C-PRP	M672151/6371270358962852152708374071 : 4439E02652668066 PRP proof power = 6 PRP: Verified Proof certified good
2021-02-25	storm5510	F-ECM	Factor: 6371270358962852152708374071 / (ECM curve 7, B1=250000, B2=25000000, Sigma=1287986895578128)
2019-06-06	Smok_bmv	NF	no factor from 2^68 to 2^69
2019-06-06	Smok_bmv	NF	no factor from 2^67 to 2^68
2019-06-06	Smok_bmv	NF	no factor from 2^66 to 2^67
2017-08-07	Smok_bmv	NF	no factor from 2^65 to 2^66
2017-07-03	Smok_bmv	NF	no factor from 2^64 to 2^65
2015-11-01	Gordon Spence	NF	no factor from 2^63 to 2^64
2015-10-31	Gordon Spence	NF	no factor from 2^62 to 2^63
2015-05-25	lycorn	NF	no factor from 2^61 to 2^62
2015-05-13	mikr	NF-PM1	B1=12500000, B2=600000000, E=12
2015-05-01	Joss	NF-PM1	B1=2114601
2015-04-11	MadPoo	C-LL	71F0F7B9A463499C
2015-04-08	Joss	NF-PM1	B1=1747605
2015-03-29	Joss	NF-PM1	B1=1588732
2015-02-20	Joss	NF-PM1	B1=1444302
2012-08-11	Joss	NF-PM1	B1=1344302
2012-06-19	Joss	NF-PM1	B1=672169
2011-09-11	Joss	NF-PM1	B1=556078
2011-07-15	Joss	NF-PM1	B1=333647
2010-08-14	Architects Cubed	NF	no factor from 2^60 to 2^61
2008-10-12	Sturle Sunde	NF	no factor from 2^59 to 2^60
2008-10-12	Sturle Sunde	NF	no factor from 2^58 to 2^59

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