47 670 877 Exponent Status

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

PrimeNet Exponent Status

M_n

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Details

Composite: proven not-prime with Lucas-Lehmer test

No factors below 2⁷³

TF target 2⁷²

P-1

B1 =	675000
B2 =	675000

Status	Date	User	Residue	Shift
Verified	2009-12-12	Avinoam	DAC415602803CD4C	19333884
Verified	2017-02-10	-Anonymous-	DAC415602803CD4C	15945801

History

Date	User	Type	Result
2017-11-17	Mark Rose	NF	no factor from 2^72 to 2^73
2017-02-10	-Anonymous-	C-LL	DAC415602803CD4C
2015-12-15	AirSquirrels	NF	no factor from 2^71 to 2^72
2015-12-15	AirSquirrels	NF	no factor from 2^70 to 2^71
2009-12-12	Avinoam	C-LL	DAC415602803CD4C
2009-10-06	Avinoam	NF-PM1	B1=675000

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