is 2 3387317 - 1
has 1019685 decimal digits
takes 0.356 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
-unknown- primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26817.596567.6471%33873171119079501.41638.3322%19.012870.3428%2.6957%
PrimeNet2600.045363.3333%140002800000.00432.8453%0.049764.3766%1.0433%
GPU722641.050865.6250%180003200000.00521.7908%1.056066.2406%0.6156%
Difference+4+16.5457+2.0221%+3369317+111587950+1.4110+6.5415%+17.9567+4.1022%+4.1022%

Known prime factors (2 factors, 120.2 bits, 0.00355000% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
3387317131397205562497191753.5451939546927
39317 × 49331
-39317493310.00050.00610.0122
33873171202685495161315488392166.70517752774469607
33 × 29 × 89 × 254750161
2018-10-19892547501616.73512.11373.9478

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
3387317158029513234745090779654508872852624137120.250
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2021-03-14T12:32:31Jocelyn LaroucheManual testing33873137260486-
skipped known factor: 13139720556249719
--0.080--3.539%
2021-03-14T18:15:36Jocelyn LaroucheManual testing33873171133656-
skipped known factor: 13139720556249719
--0.108--4.077%
2021-12-28T19:52:00Jocelyn LaroucheManual testing33873173387317-
skipped known factor: 13139720556249719
--0.516--3.898%
2021-12-29T13:07:59Jocelyn LaroucheManual testing3387317111907950-
skipped known factor: 13139720556249719
--1.416--8.332%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2021-10-24T13:13:39Jocelyn LaroucheManual testing267268--8.824--


ECM factoring results:

Old Calculation Method

Total ECM effort:0.586 GHz-days
Estimated T-Level:0.200
DigitsB1CurvesCompleteFacMiss
20110004 / 1000.04096.060%
25500004 / 2800.01498.579%

New Calculation Method

Total ECM effort:0.586 GHz-days
Estimated T-Level:0.200
DigitsB1CompleteFacMiss
20110000.12987.895%
25500000.01298.841%


ECM Summary

B1B2factorcurvesGHz-days
50000500000030.439
50000500000010.146


Lucas-Lehmer results:
No L-L results for M3387317


PRP results:
dateuseridcompidcofactorsres64PRP
2017-11-05T18:23:03Oliver KruseGTX-3
13139720556249719
1502BE9CEC1FC5__no
2017-12-15T20:55:27kkmrkkblmbrbkc4.xlarge
13139720556249719
1502BE9CEC1FC5__no
2018-10-21T04:59:12J.R. AllenManual testing
13139720556249719
120268549516131548839
1502BE9CEC1FC5__no
2018-10-21T12:05:41Oliver KruseGTX-5
13139720556249719
120268549516131548839
1502BE9CEC1FC5__no


P-1 factor-bounds graph:
B1 = 3387317, B2 = 111907950 (P-1 stage 2)
B1 = 3387317 (P-1 stage 1)
B1 = 338731, B2 = 7113365 (P-1 stage 2)
B1 = 338731, B2 = 3726048 (P-1 stage 2)
B1 = 338731 (P-1 stage 1)
100
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100
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109
TF factor-bounds graph:
268
250
260
270
280
290
2100
Last modified: 2021-12-29T13:07:59+00:00