is 2 2005919 - 1
has 603842 decimal digits
takes 0.132 GHz-days to do one PRP test
Last-known PrimeNet details:
0 L-L tests remaining
ResidueStatus
L-LF531FF7AFEB37F32double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26714.813168.6567%500000150000000.12305.1249%14.936173.7816%9.9885%
PrimeNet2580.019163.7931%80001400000.00142.4803%0.020666.2734%2.4803%
GPU722620.306366.1290%80001100000.00131.2374%0.307667.3665%1.2374%
Difference+5+14.5068+2.5277%+492000+14890000+0.1217+3.8875%+14.6285+6.4151%+6.4151%

Known prime factors (2 factors, 129.8 bits, 0.00647307% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
20059194612198331577276011858.678114964720200
23 × 33 × 52 × 11 × 172 × 37 × 181
2001-12-222892890.03012.755e-55.607e-5
200591926496316610902557749532271.166660453303720204
22 × 32 × 239 × 8609 × 8916389
2016-01-1586098916389357.240.04710.0865

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
2005919122206267265748041188851933070873257775340129.845
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-01-15T21:19:56alpertronManual testing50000015000000122271.1660.1230.2640.2465.125%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-12-22T00:00:00ANONYMOUSv4_computers??58.678180.0110.2680.022
1999-01-02T00:00:00ANONYMOUSv4_computers?258--0.019--


ECM factoring results:
Total ECM effort:1.100 GHz-days
Estimated T-Level:0.650
DigitsB1CurvesCompleteFacMiss
201100013 / 1000.13087.752%
255000013 / 2800.04695.455%

ECM Summary

B1B2factorcurvesGHz-days
500005000000131.100


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-01-10T00:00:00ANONYMOUSv4_computersF531FF7AFEB37F320.132


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-30T15:33:18alpertronManual testing
461219833157727601
2649631661090255774953
9F0B08CF9DF6CE__no
2017-10-20T18:46:33Oliver KruseThreadripper
461219833157727601
2649631661090255774953
9F0B08CF9DF6CE__no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (stage 2)
B1 = 500000 (stage 1)
101
102
103
104
105
106
101
102
103
104
105
106
107
108
TF factor-bounds graph:
267
258
2
250
260
270
280
290
2100
Last modified: 2021-04-16T17:07:21+00:00