is 2 1864979 - 1
has 561415 decimal digits
takes 0.101 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
Actual26715.932668.6567%500000150000000.10155.0801%16.034070.2490%1.5923%
PrimeNet2570.010363.1579%90001600000.00143.0276%0.011664.2733%1.1154%
GPU722610.164765.5738%100001500000.00141.6887%0.166166.1551%0.5814%
Difference+6+15.7679+3.0829%+490000+14850000+0.1001+3.3914%+15.8680+4.0939%+4.0939%

Known prime factors (5 factors, 291.7 bits, 0.01563871% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
18649793729959721.8311
1
-111.498e-137.866e-81.601e-7
1864979282134023131134.7167564
22 × 31 × 61
2008-07-1531612.009e-92.567e-64.963e-6
186497920566030713423839945532270.801551374324145844
22 × 3 × 3449 × 13322081863
2020-12-10344913322081863187.0757.095106.64
18649793911262076682392924021512478.372104860753839115425
32 × 52 × 17 × 27414576167089
2020-07-03252741457616708945,933117,492219,442
1864979741951069212776430410990312685.94019891673558060879785
5 × 7 × 547 × 42061 × 24702241253
2021-09-0342061247022412536,843,375105.87197.73

26 Composite Factors:
exponentprime factorscomposite factordigitsbits*
18649791052348338779951671856.546
186497976710451353811672619389133272892.631
1864979145888471842801816284903474180931100.203
18649795802376984993412060685578960108932105.516
186497927674470681698183615993470056972933107.770
18649791103500105210202078889633034957526335113.088
1864979209329640122605696309093175527745870337120.655
186497921642628256569042256462721412468832535139127.347
18649794116010148929740135973096745437139840421741134.918
1864979780790975142074220399368871898295458638317743142.486
186497980439135997300003127294870232663964226948350345149.173
186497915258988477287617300596002350450852998503757814348156.740
18649792901965079765885786534151747111688580394706841568150164.312
186497930003467926535312236468164687815704734398404173663
77
52171.003
186497956915401401755243738913764331085313199446077993268
6137
54178.571
186497922694617056019454699865283252552763364723338432855
542439
56183.888
186497910824210766958483582455138116504966825640460336068
5087079
57186.142
186497943050798079914680991489406899276353258080890625716
34444759
58191.456
186497981874308293712071548296461155453905663443708456854
3570870153
60199.027
186497984649991139653269232854812055408452687120098697675
426220230001
62205.719
186497916057771175536048359633483666861792732215814071740
631041938834881
65213.287
186497930538781308890598468021231995493569451451283135202
00209059265013727
67220.858
186497959681902959748670656849461791418432469669482989061
585254685841843785593
71235.112
186497922261105108184119185455156165405730495613591510039
7161474982747957804666680687
78256.943
186497916838295390088146906086318345988099261906072937091
04283124000224363812634222276609
82269.828
186497962806151434917794345678817891483424734839913906359
16902776912752867822209331088638229031
88291.659
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-16T12:37:25alpertronManual testing5000001500000012-
skipped known factor: 3729959
skipped known factor: 28213402313
--0.101--5.080%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2008-07-15T07:47:00J FeitsmaManual testing??34.716117.81998e-100.2161.66997e-9


ECM factoring results:

Old Calculation Method

Total ECM effort:19.151 GHz-days
Estimated T-Level:24.482
DigitsB1CurvesCompleteFacMiss
2011000251 / 1002.5108.025%
2550000251 / 2800.89640.737%

New Calculation Method

Total ECM effort:19.151 GHz-days
Estimated T-Level:24.482
DigitsB1CompleteFacMiss
20110008.5440.019%
25500000.77446.121%
302500000.04895.327%
3510000000.00299.780%


ECM Summary

B1B2factorcurvesGHz-days
500005000000161.107
500005000000312.146
50000500000030.208
500006600000937.260
5000066000001088.430


Lucas-Lehmer results:
No L-L results for M1864979


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-04T10:02:21Oliver KruseGTX-2
3729959
28213402313
345585FC0D67AD__no
2017-11-07T10:57:12ATHec2-1xf
3729959
28213402313
345585FC0D67AD__no
2020-07-03T13:50:34CrypticCluecruncher
3729959
28213402313
391126207668239292402151
180378A3E6DEA0AFno
2020-07-04T14:21:17marssystemsSYSTEM01
3729959
28213402313
391126207668239292402151
180378A3E6DEA0AFno
2020-12-11T11:19:30Massimo Cappelli (ik5pwa)maxlinux_8
3729959
28213402313
2056603071342383994553
391126207668239292402151
180378A3E6DEA0AFno
2021-09-04T05:57:41SRJ2877LTOS
3729959
28213402313
2056603071342383994553
391126207668239292402151
74195106921277643041099031
180378A3E6DEA0AFno


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
100
101
102
103
104
105
106
100
101
102
103
104
105
106
107
108
109
1010
1011
1012
1013
1014
TF factor-bounds graph:
267
2
220
230
240
250
260
270
280
290
2100
Last modified: 2021-09-04T05:57:41+00:00