is 2 7974041 - 1
has 2400426 decimal digits
takes 2.082 GHz-days to do one PRP test
Last-known PrimeNet details:
0 L-L tests remaining
ResidueStatus
L-L438ED0A9176CA3F3double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2673.726365.6716%10000019500000.07603.2173%3.802466.7761%3.2840%
PrimeNet2630.200263.4921%340009000000.03073.5643%0.230964.7933%1.3012%
GPU722673.726365.6716%5500012000000.04442.5655%3.770866.5523%0.8807%
Difference---+45000+750000+0.0316+0.6518%+0.0316+0.2238%+0.2238%

Known prime factors (2 factors, 146.0 bits, 0.00183054% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
797404112700755196582056376392270.10579638135774459
3 × 17 × 60727 × 25713967
2012-06-26607272571396732.1670.55220.9907
7974041687079319293497906153532375.8634308225398474236
22 × 233 × 252913 × 18277271
2021-05-12252913182772711,025.20.46760.7042

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
79740418726426234980955479475047727385655954807156744145.968
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-10-26T00:00:00ANONYMOUSv4_computers4000040000---0.015--0.674%
2012-06-26T07:24:00firejuggler10000019500002270.1050.0764.1640.1523.217%


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2021-04-30T13:48:56firejugglerMaison5000002650000027--0.713
2021-05-12T07:01:29firejugglerMaison5000002650000065P-12375.8630.713


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-10-25T00:00:00ANONYMOUSv4_computers?263--0.123--


ECM factoring results:
Exponent "7974041" not found


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-11-04T00:00:00ANONYMOUSv4_computers438ED0A9176CA3F32.082
2003-01-09T00:00:00ANONYMOUSv4_computers438ED0A9176CA3F32.082


PRP results:
dateuseridcompidcofactorsres64PRP
2018-06-23T07:55:10francijezekmacos
1270075519658205637639
46D9133F71E95E__no
2018-07-10T18:23:45GunnarLuRibenboim
1270075519658205637639
46D9133F71E95E__no
2021-05-14T04:04:26kutenscanopus
1270075519658205637639
68707931929349790615353
46D9133F71E95EDEno


P-1 factor-bounds graph:
B1 = 100000, B2 = 1950000 (stage 2)
B1 = 100000 (stage 1)
B1 = 40000 (stage 1)
103
104
105
106
103
104
105
106
107
108
TF factor-bounds graph:
267
263
250
260
270
280
290
2100
Last modified: 2021-05-14T04:04:26+00:00