371 447 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Composite: proven not-prime with Lucas-Lehmer test

No factors below 2⁶⁸

TF target 2⁴⁴

TF below 2^101 is very unlikely to find new factors due to ECM effort.

P-1

B1 =	77000000
B2 =	2222637957540

ECM

Estimated T-Level: 31.9 ⓘ

Status	Date	User	Residue	Shift
Verified		David Slowinski	3FC6	0
Verified		Jim Kraemer	D97D664B232EBFC6	0
Verified		Eivind Triel	D97D664B232EBFC6	44680
Verified	2002-01-02	Dennis Pope	D97D664B232EBFC6	73407

History

Date	User	Type	Result
2023-07-15	JacobZ	NF-PM1	B1=77000000, B2=2222637957540
2023-02-05	Joss	NF-PM1	B1=1000000, B2=28509731250
2023-01-15	masser	NF-PP1	Start=6/5, B1=20000000, B2=620000000
2023-01-09	masser	NF-PP1	Start=156/71, B1=20000000, B2=620000000
2023-01-05	masser	NF-PP1	Start=2/7, B1=20000000, B2=640000000
2022-11-08	Gordon Spence	NF	no factor from 2^67 to 2^68
2022-09-12	LordJulius	NF	no factor from 2^66 to 2^67
2022-03-07	LordJulius	NF	no factor from 2^54 to 2^55
2019-11-28	Gordon Spence	NF	no factor from 2^65 to 2^66
2018-02-22	Gordon Spence	NF	no factor from 2^64 to 2^65
2018-02-09	BloodERazor	NF	no factor from 2^64 to 2^65
2016-12-08	mikr	NF-PM1	B1=60000000, B2=3000000000, E=12
2015-11-21	Gordon Spence	NF	no factor from 2^63 to 2^64
2015-11-21	Gordon Spence	NF	no factor from 2^62 to 2^63
2015-08-13	NR	NF	no factor from 2^61 to 2^62
2013-01-14	Sid & Andy	NF	no factor from 2^60 to 2^61
2012-08-04	alpertron	NF-PM1	B1=10000000, B2=200000000, E=12
2012-05-29	Joss	NF-PM1	B1=3599340
2012-03-05	Joss	NF-PM1	B1=1499725
2011-08-20	Joss	NF-PM1	B1=1199780
2009-01-24	Sturle Sunde	NF	no factor from 2^59 to 2^60
2009-01-06	Sturle Sunde	NF	no factor from 2^58 to 2^59

Username
Password