is 2 1236701 - 1
has 372285 decimal digits
takes 0.038 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L62DBE42A888B1454double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26724.026868.6567%1000000200000000.09055.5041%24.117370.3819%1.7252%
PrimeNet2560.007862.5000%5500900000.00042.4311%0.008263.4117%0.9117%
GPU722600.124265.0000%5000300000.00030.8316%0.124565.2910%0.2910%
Difference+7+23.9026+3.6567%+995000+19970000+0.0902+4.6725%+23.9928+5.0908%+5.0908%

Known prime factors (1 factor, 64.8 bits, 0.00524236% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1236701328449879295313654332064.83213279276045516
22 × 13 × 2141 × 119276363
2007-11-0721411192763633.94790.28910.5397

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-02-24T00:00:00ANONYMOUSv4_computers2048204800---0.001--0.238%
2003-11-28T00:00:00eteov4_computers2000002000000---0.013--2.756%
2003-12-13T00:00:00eteov4_computers100000020000000---0.090--5.504%
2016-03-17T19:02:39alpertronManual testing3000001000000012---0.037--4.177%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-11-14T00:00:00ANONYMOUSv4_computers21257--0.016--
2003-05-26T00:00:00ANONYMOUSv4_computers21258--0.031--
2022-04-13T05:54:05LordJuliusManual testing21261--0.248--
2022-04-13T05:54:05LordJuliusManual testing261262--0.248--
2022-04-13T05:54:05LordJuliusManual testing262263--0.794--
2022-04-13T05:54:05LordJuliusManual testing263264--1.588--


ECM factoring results:

Old Calculation Method

Total ECM effort:19.780 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:19.780 GHz-days
Estimated T-Level:25.344
DigitsB1CompleteFacMiss
201100015.2080.000%
25500001.66718.888%
302500000.13787.162%
3510000000.00999.076%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
50000500000028110.41
25000035000000449.371


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2002-08-17T00:00:00ANONYMOUSv4_computers62DBE42A888B14540.038


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-29T17:10:04Oliver KruseGTX-1
32844987929531365433
D92A94A48D4A3A__no
2017-10-20T02:16:49kkmrkkblmbrbkc4.xlarge
32844987929531365433
D92A94A48D4A3A__no


P-1 factor-bounds graph:
B1 = 1000000, B2 = 20000000 (P-1 stage 2)
B1 = 1000000 (P-1 stage 1)
B1 = 300000, B2 = 10000000 (P-1 stage 2)
B1 = 300000 (P-1 stage 1)
B1 = 200000, B2 = 2000000 (P-1 stage 2)
B1 = 200000 (P-1 stage 1)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 2048 (P-1 stage 1)
102
103
104
105
106
102
103
104
105
106
107
108
109
TF factor-bounds graph:
267
264
263
262
261
258
257
250
260
270
280
290
2100
Last modified: 2022-04-13T05:54:05+00:00