is 2 8126297 - 1
has 2446260 decimal digits
takes 2.122 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L2008B1F6E7913B84double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2687.334866.1765%21500053750000.18784.0546%7.522767.5479%1.3714%
PrimeNet2630.196463.4921%360009000000.03153.6147%0.227964.8117%1.3197%
GPU722673.656565.6716%5500012000000.04442.5732%3.701066.5550%0.8833%
Difference+1+3.6783+0.5048%+160000+4175000+0.1434+1.4814%+3.8217+0.9929%+0.9929%

Known prime factors (2 factors, 141.1 bits, 0.00173576% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
8126297827195906090903998072066.1655089623884599
877 × 9931 × 584377
2012-09-2299315843772.68480.01560.0225
8126297349655684161220304721512374.8882151383860085475
3 × 52 × 29 × 1489 × 1613 × 411841
2012-09-221613411841472.330.00910.0159

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
8126297289233750479575579667861642287308956927485743141.053
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-11-02T00:00:00ANONYMOUSv4_computers40000640000---0.028--1.795%
unknown2150005375000---0.188--4.055%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-08-24T00:00:00ANONYMOUSv4_computers21261--0.038--
1998-09-13T00:00:00Baquarav4_computers21262--0.076--
1999-04-13T00:00:00ANONYMOUSv4_computers21263--0.196--
2022-04-09T01:54:33LordJuliusManual testing21264--0.438--
2022-04-09T01:54:33LordJuliusManual testing264265--0.460--
2022-04-09T01:54:34LordJuliusManual testing265266--0.920--
2022-04-09T01:54:34LordJuliusManual testing26626766.165200.8674.3181.765
2022-03-31T06:14:51FlaukrotistManual testing267268--3.678--


ECM factoring results:

Old Calculation Method

Total ECM effort:0.000 GHz-days
DigitsB1CurvesCompleteFacMiss

New Calculation Method

Total ECM effort:0.000 GHz-days
DigitsB1CompleteFacMiss


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2000-03-01T00:00:00ANONYMOUSv4_computers2008B1F6E7913B842.122
2003-02-16T00:00:00Team Prime Ribv4_computers2008B1F6E7913B842.122


PRP results:
dateuseridcompidcofactorsres64PRP
2018-06-04T05:33:40kkmrkkblmbrbkc5.large
82719590609090399807
34965568416122030472151
643EF548F36F60__no
2020-02-15T21:45:39Luigi MorelliCS50X-C9
82719590609090399807
34965568416122030472151
643EF548F36F60E0no


P-1 factor-bounds graph:
B1 = 215000, B2 = 5375000 (P-1 stage 2)
B1 = 215000 (P-1 stage 1)
B1 = 40000, B2 = 640000 (P-1 stage 2)
B1 = 40000 (P-1 stage 1)
102
103
104
105
106
102
103
104
105
106
107
TF factor-bounds graph:
268
267
266
265
264
263
262
261
250
260
270
280
290
2100
Last modified: 2022-04-09T01:54:34+00:00