is 2 208799 - 1
has 62855 decimal digits
takes 0.001 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
Actualunknown30000000100708329922203,668.770372.6033%3,668.770372.6033%72.6033%
PrimeNet2400.000055.0000%2200550000.000012.9649%0.000060.8342%5.8342%
GPU722440.000059.0909%3600800000.00018.9289%0.000162.7436%3.6527%
Difference-440.0000-59.0909%+29996400+10070832912220+3,668.7703+63.6744%+3,668.7703+9.8596%+9.8596%

Known prime factors (4 factors, 268.7 bits, 0.12868647% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
2087992949331810791238.102706261
23 × 30707
-23307073.280e-71.133e-52.089e-5
20879927170100283355339931961.2376506281228204
22 × 19 × 127 × 674086327
2014-08-151276740863271.66350.24560.4586
2087993091985462609878160573532478.033740421520842982524
22 × 3 × 7 × 13 × 8861 × 76519770427
2014-08-15886176519770427298,51527.87552.062
20879931011281895471945510510537112891.3257426108816486655949145
5 × 103 × 41203 × 349965506634881
2020-06-24412033499655066348813.818e+9127,485238,106

11 Composite Factors:
exponentprime factorscomposite factordigitsbits*
2087998013364106805429681276289184473099.338
2087999119291083375547794665603619842388735116.134
20879991462560187691416554158253392011793416939129.426
20879984009555093787242427039198618195716910052942139.270
208799842579639015374629871630192241561630650929802346152.562
20879995886432797696162706792391907011946761901625948698
3
51169.358
20879924777205324842179598634023411891363959694854311169
0791
54177.371
20879924850469324719993897695211001330407732250919602146
35706817
58190.663
20879928280090647342286929625847305570288624144239944311
9608782394657
63207.459
20879926052439949266172704261170719924524234646944924784
25674743115537513119
70230.594
20879976837289891066936873551469788480324993100512931355
3523029854051633975143365075401
81268.696
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2021-05-13T03:19:24Oliver KruseOllaptop300000003000000000-
skipped known factor: 294933181079
skipped known factor: 2717010028335533993
--1.282--43.655%
2022-02-15T00:42:14Oliver KruseThreadripper-PC3000000010070832992220-
skipped known factor: 294933181079
skipped known factor: 2717010028335533993
skipped known factor: 309198546260987816057353
--3,669--62.716%


Trial Factoring results:
No TF results for M208799


ECM factoring results:

Old Calculation Method

Total ECM effort:11.099 GHz-days
Estimated T-Level:28.078
DigitsB1CurvesCompleteFacMiss
2011000675 / 1006.7500.113%
2550000675 / 2802.4118.936%
30250000394 / 6400.61654.004%

New Calculation Method

Total ECM effort:11.099 GHz-days
Estimated T-Level:28.078
DigitsB1CompleteFacMiss
201100041.8980.000%
25500005.5880.374%
302500000.56556.813%
3510000000.04595.585%
4030000000.00399.705%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
10.00000e+0
5000050000002811.373
250000250000002836.914
25000025000000832.028
2500003125000070.185
2500003600000070.196
25000038500000140.403


Lucas-Lehmer results:
No L-L results for M208799


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-22T02:53:32Oliver KruseOllaptop8411732A82754D__?
2017-09-22T10:03:16Oliver KruseManual testing8411732A82754D__?
2017-10-12T08:37:44kkmrkkblmbrbkc4.xlarge8411732A82754D__no
2020-04-17T19:11:48Oliver KruseAddPrpType5
294933181079
2717010028335533993
309198546260987816057353
4576DAC369CEF3__no
2020-06-24T09:42:01CrypticClueManual testing
294933181079
2717010028335533993
309198546260987816057353
3101128189547194551051053711
4576DAC369CEF38Eno


P-1 factor-bounds graph:
B1 = 30000000, B2 = 10070832992220 (P-1 stage 2)
B1 = 30000000, B2 = 3000000000 (P-1 stage 2)
B1 = 30000000 (P-1 stage 1)
100
101
102
103
104
105
106
107
108
100
101
102
103
104
105
106
107
108
109
1010
1011
1012
1013
1014
1015
TF factor-bounds graph:
230
240
250
260
270
280
290
2100
Last modified: 2022-05-25T18:19:02+00:00