is 2 1153849 - 1
has 347344 decimal digits
takes 0.034 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L2AE9380EE64B06C8double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26725.752068.6567%300000100000000.03564.1402%25.787669.9544%1.2977%
PrimeNet2560.008362.5000%5000800000.00042.2517%0.008763.3444%0.8444%
GPU722600.133165.0000%5000260000.00030.7714%0.133465.2700%0.2700%
Difference+7+25.6189+3.6567%+295000+9974000+0.0353+3.3688%+25.6542+4.6844%+4.6844%

Known prime factors (1 factor, 58.5 bits, 0.00506884% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
11538494039024443179307771858.487175023960812
22 × 178169 × 245587
2007-10-091781692455870.04000.00780.0156

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-03-16T00:00:00Jocelyn Larouchev4_computers10001000---4.29764e-5--0.005%
2002-03-24T00:00:00Jocelyn Larouchev4_computers40004000---0.000--0.049%
2002-06-02T00:00:00ANONYMOUSv4_computers500001000000---0.004--1.743%
2016-03-17T19:01:59alpertronManual testing3000001000000012-
skipped known factor: 403902444317930777
--0.036--4.140%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-11-14T00:00:00ANONYMOUSv4_computers21257--0.017--
2003-05-04T00:00:00ANONYMOUSv4_computers21258--0.033--


ECM factoring results:

Old Calculation Method

Total ECM effort:17.753 GHz-days
Estimated T-Level:25.344
DigitsB1CurvesCompleteFacMiss
2011000325 / 1003.2503.815%
2550000325 / 2801.16131.261%
3025000044 / 6400.06993.351%

New Calculation Method

Total ECM effort:17.753 GHz-days
Estimated T-Level:25.344
DigitsB1CompleteFacMiss
201100014.8080.000%
25500001.62019.795%
302500000.13287.678%
3510000000.00999.129%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
5000050000002819.96
25000025000000447.796


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2002-07-14T00:00:00ANONYMOUSv4_computers2AE9380EE64B06C80.034


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-29T07:35:38Oliver KruseGTX-0
403902444317930777
8EE4BF7708D310__no
2017-10-17T07:04:47Oliver KruseThreadripper
403902444317930777
8EE4BF7708D310__no
2018-01-03T03:45:40ATHec2-1xf
403902444317930777
8EE4BF7708D310__no


P-1 factor-bounds graph:
B1 = 300000, B2 = 10000000 (P-1 stage 2)
B1 = 300000 (P-1 stage 1)
B1 = 50000, B2 = 1000000 (P-1 stage 2)
B1 = 50000 (P-1 stage 1)
B1 = 4000 (P-1 stage 1)
B1 = 1000 (P-1 stage 1)
102
103
104
105
106
102
103
104
105
106
107
TF factor-bounds graph:
267
258
257
250
260
270
280
290
2100
Last modified: 2020-09-18T09:17:43+00:00