is 2 2953207 - 1
has 889004 decimal digits
takes 0.251 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L939D258E98588214double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26710.061667.1642%20482048000.00160.3050%10.063267.2643%0.1001%
PrimeNet2600.052063.3333%120002200000.00292.5078%0.054964.2529%0.9195%
GPU722641.205265.6250%120002000000.00271.3469%1.208066.0880%0.4630%
Difference+3+8.8563+1.5392%-9952+4800-0.0011-1.0419%+8.8552+1.1763%+1.1763%

Known prime factors (1 factor, 80.4 bits, 0.00272281% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
295320716064433361537783762033512580.410271982853920124525
3 × 52 × 31 × 47 × 7177 × 346798943
2009-04-057177346798943128,9502.33264.3552

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-12-13T00:00:00ANONYMOUSv4_computers2048204800---0.002--0.305%
2003-12-23T00:00:00Team Prime Ribv4_computers1000010000---0.001--0.177%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-05-02T00:00:00ANONYMOUSv4_computers21260--0.052--
2009-02-13T18:40:00Sturle Sundeakerman.ifi260261--0.052--


ECM factoring results:

Old Calculation Method

Total ECM effort:0.000 GHz-days
DigitsB1CurvesCompleteFacMiss

New Calculation Method

Total ECM effort:0.000 GHz-days
DigitsB1CompleteFacMiss


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-05-16T00:00:00ANONYMOUSv4_computers939D258E985882140.251


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-26T00:49:03Oliver KruseGTX-1
1606443336153778376203351
BA5338D17099BE__no
2017-12-09T13:51:19kkmrkkblmbrbkc4.xlarge
1606443336153778376203351
BA5338D17099BE__no


P-1 factor-bounds graph:
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 10000 (P-1 stage 1)
B1 = 2048 (P-1 stage 1)
102
103
104
102
103
104
105
106
107
108
109
TF factor-bounds graph:
267
261
260
250
260
270
280
290
2100
Last modified: 2017-12-09T13:51:19+00:00