is 2 9002671 - 1
has 2710075 decimal digits
takes 2.488 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LD0EF852FFDEBBA07double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2686.620864.7059%2500000720000002.51948.3817%9.140267.6641%2.9583%
PrimeNet2640.395462.5000%3600010000000.03553.3269%0.430863.7476%1.2476%
GPU722686.620864.7059%6000013000000.05112.4000%6.671965.5529%0.8471%
Difference---+2440000+70700000+2.4683+5.9817%+2.4683+2.1112%+2.1112%

Known prime factors (1 factor, 87.1 bits, 0.00096701% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
90026711609125094589525219509255212787.0568936931576137377560
23 × 3 × 5 × 11 × 739 × 1181527 × 7754011
2018-03-01118152777540114,973,5940.61700.9637

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2012-05-22T14:46:00Squeeky_SquirrelP4_26001000001675000---0.074--2.816%
2018-03-01T09:07:07mikrColor250000072000000122787.0562.5194.9765.0398.382%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-11-28T00:00:00Lars Frickev4_computers21261--0.034--
1998-12-21T00:00:00ANONYMOUSv4_computers21263--0.177--
2016-02-23T16:39:27Mark RoseManual testing263264--0.218--
2009-12-09T06:52:00Budannan264265--0.415--
2015-05-12T08:17:00VictordeHollanderManual testing265266--0.830--
2016-03-16T23:47:03snme2pm1Manual testing266267--1.660--
2016-12-17T09:23:56snme2pm1Manual testing267268--3.320--


ECM factoring results:

Old Calculation Method

Total ECM effort:1.261 GHz-days
Estimated T-Level:0.150
DigitsB1CurvesCompleteFacMiss
20110003 / 1000.03097.030%
25500003 / 2800.01198.932%

New Calculation Method

Total ECM effort:1.261 GHz-days
Estimated T-Level:0.150
DigitsB1CompleteFacMiss
20110000.09790.776%
25500000.00999.129%


ECM Summary

B1B2factorcurvesGHz-days
50000500000031.261


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2003-05-19T00:00:00Team Prime Ribv4_computersD0EF852FFDEBBA072.488


PRP results:
dateuseridcompidcofactorsres64PRP
2019-05-29T17:40:26vnatinvnatin
160912509458952521950925521
955B43B054E5C7__no
2020-10-20T15:57:58oodairacom2
160912509458952521950925521
955B43B054E5C798no


P-1 factor-bounds graph:
B1 = 2500000, B2 = 72000000 (P-1 stage 2)
B1 = 2500000 (P-1 stage 1)
B1 = 100000, B2 = 1675000 (P-1 stage 2)
B1 = 100000 (P-1 stage 1)
104
105
106
107
104
105
106
107
108
TF factor-bounds graph:
268
267
266
265
264
263
261
250
260
270
280
290
2100
Last modified: 2020-10-20T15:57:58+00:00