is 2 16880057 - 1
has 5081404 decimal digits
takes 9.230 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual27014.155864.2857%----14.155864.2857%
Target2697.072763.7681%12000032000000.22823.2920%7.300864.9609%
Difference+1+7.0831+0.5176%-120000-3200000-0.2282-3.2920%+6.8549-0.6751%

Known prime factors (6 factors, 257.7 bits, 0.00152641% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1688005721606472971031.00964
26
-64641.718e-115.074e-50.0001
1688005749627367591032.208147
3 × 72
2008-09-0849493.497e-113.885e-57.907e-5
16880057939881573771136.4522784
25 × 3 × 29
2008-09-0832328.691e-102.537e-55.164e-5
1688005737774866756891341.781111892
22 × 11 × 2543
2008-09-081125432.116e-80.00010.0002
168800572289792898494471547.7026782539
23 × 294893
2008-09-08232948931.202e-60.01280.0238
168800574195986586814692334232168.50812428828252223
3 × 839 × 4937953219
2023-01-2483949379532195.0052213.31398.40

57 Composite Factors:
P-1 results:
No P-1 results for M16880057


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2008-09-08Will EdgingtonManual testing??47.702159.11165e-819.221.89742e-7
2008-09-08Will EdgingtonManual testing??41.781133.80153e-919.227.91634e-9
2008-09-08Will EdgingtonManual testing??32.208101.07851e-1219.222.24590e-12
2008-09-08Will EdgingtonManual testing??36.452113.26811e-1019.226.80555e-10
2023-01-24LordJuliusManual testing267268--1.771--
2023-01-24LordJuliusManual testing26826968.508211.47418.793.001
2023-01-24LordJuliusManual testing268269
skipped known factors(?)
--3.542--
2023-01-24LordJuliusManual testing269270--7.083--


ECM factoring results:
No ECM results for M16880057


Lucas-Lehmer results:
No L-L results for M16880057


PRP results:
dateuseridcompidcofactorsres64PRP
2023-01-30Naegi Makoto5950X
2160647297
4962736759
93988157377
3777486675689
228979289849447
419598658681469233423
601727B4727F11CAno


P-1 factor-bounds graph:
100
101
102
103
100
101
102
103
104
105
106
107
108
109
1010
TF factor-bounds graph:
270
269
268
2
230
240
250
260
270
280
290
2100
Last modified: 2023-01-30T18:49:42+00:00