is 2 1470187 - 1
has 442571 decimal digits
takes 0.056 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L9026E7A9BBAE3C72double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26720.211068.6567%500000150000000.07144.9364%20.282470.2039%1.5472%
PrimeNet2560.006562.5000%70001200000.00072.9118%0.007363.5919%1.0919%
GPU722600.104565.0000%65001000000.00061.4471%0.105165.5065%0.5065%
Difference+7+20.1065+3.6567%+493500+14900000+0.0708+3.4893%+20.1773+4.6974%+4.6974%

Known prime factors (1 factor, 56.4 bits, 0.00383480% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1470187936909357416206811756.37931863611820
22 × 3 × 5 × 531060197
2008-01-1155310601970.01091.60182.9917

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-09-29T00:00:00Team Prime Ribv4_computers20000270000---0.002--0.962%
2016-03-17T19:14:45alpertronManual testing5000001500000012---0.071--4.936%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2003-07-30T00:00:00ANONYMOUSv4_computers21258--0.026--


ECM factoring results:

Old Calculation Method

Total ECM effort:25.502 GHz-days
Estimated T-Level:25.391
DigitsB1CurvesCompleteFacMiss
2011000299 / 1002.9904.954%
2550000299 / 2801.06834.309%
3025000050 / 6400.07892.479%

New Calculation Method

Total ECM effort:25.502 GHz-days
Estimated T-Level:25.391
DigitsB1CompleteFacMiss
201100014.5770.000%
25500001.64419.326%
302500000.14086.905%
3510000000.01099.023%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
50000500000024911.82
250000350000005013.69


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-02-07T00:00:00ANONYMOUSv4_computers9026E7A9BBAE3C720.056


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-01T04:38:29Oliver KruseGTX-1
93690935741620681
49DB629C651173__no
2017-10-28T04:33:41kkmrkkblmbrbkc4.xlarge
93690935741620681
49DB629C651173__no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 20000, B2 = 270000 (P-1 stage 2)
B1 = 20000 (P-1 stage 1)
100
101
102
103
104
105
106
100
101
102
103
104
105
106
107
108
109
TF factor-bounds graph:
267
258
250
260
270
280
290
2100
Last modified: 2021-12-03T11:50:39+00:00