523 927 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 2^97 is very unlikely to find new factors due to ECM effort.

P-1

B1 =	70000000
B2 =	3378026802150

ECM

Estimated T-Level: 30.6 ⓘ

Status	Date	User	Residue	Shift
Verified		David Slowinski	10D6	0
Verified		Dave Smitley	50D6	0
Verified		Guillermo Ballester Valor	2F747FD974F950D6	0
Verified	2001-10-20	Brian J. Beesley	2F747FD974F950D6	75615
Verified	2015-04-11	MadPoo	2F747FD974F950D6	363910

History

Date	User	Type	Result
2023-09-16	masser	NF-PP1	Start=6/5, B1=10000000, B2=790000000
2023-09-12	masser	NF-PP1	Start=94/13, B1=10000000, B2=790000000
2023-09-06	linament	NF-PM1	B1=70000000, B2=3378026802150
2023-09-04	linament	NF-PM1	B1=70000000
2023-06-05	Joss	NF-PM1	B1=1048854, B2=55027422450
2023-01-16	Joss	NF-PM1	B1=1048854, B2=9303594300
2022-05-09	Gordon Spence	NF	no factor from 2^67 to 2^68
2022-03-07	LordJulius	NF	no factor from 2^54 to 2^55
2021-06-07	happy5214	NF-PP1	Start=2/7, B1=12500000, B2=962500000
2020-09-21	Gordon Spence	NF	no factor from 2^66 to 2^67
2018-05-23	chuenkit	NF	no factor from 2^65 to 2^66
2017-11-10	BloodERazor	NF	no factor from 2^64 to 2^65
2016-02-23	Mark Rose	NF	no factor from 2^60 to 2^61
2016-02-23	Mark Rose	NF	no factor from 2^58 to 2^60
2015-09-08	Gordon Spence	NF	no factor from 2^63 to 2^64
2015-09-08	Gordon Spence	NF	no factor from 2^62 to 2^63
2015-07-09	NR	NF	no factor from 2^61 to 2^62
2015-04-11	MadPoo	C-LL	2F747FD974F950D6
2013-01-28	markr	NF-PM1	B1=25000000, B2=1000000000, E=12
2012-07-14	Joss	NF-PM1	B1=1047854
2011-05-27	Joss	NF-PM1	B1=1000000

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