is 2 1672637 - 1
has 503514 decimal digits
takes 0.079 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
Actual26717.764768.6567%500000150000000.08805.0139%17.852770.2282%1.5715%
PrimeNet2570.011563.1579%70001200000.00092.5703%0.012464.1048%0.9469%
GPU722610.183765.5738%7000800000.00071.2072%0.184465.9894%0.4156%
Difference+6+17.5811+3.0829%+493000+14920000+0.0873+3.8067%+17.6683+4.2389%+4.2389%

Known prime factors (5 factors, 236.6 bits, 0.01414675% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
167263713381097823.6744
22
-446.687e-132.730e-75.555e-7
16726377181466959511239.385214675
52 × 31 × 277
2008-07-15312776.421e-83.030e-64.305e-6
1672637110710504920411443.3323309460
22 × 5 × 72 × 11 × 307
2008-09-30493079.341e-74.303e-66.805e-6
167263762923581704518723271962.4481880969442399
32 × 317 × 10861 × 60703
2015-04-2910861607030.92100.00090.0015
16726372541815610339703254232167.78475982284570403
1498531 × 50704513
2018-02-0314985315070451329.3030.28520.3521

26 Composite Factors:
exponentprime factorscomposite factordigitsbits*
167263796095905987498382471963.059
16726371481428005258983489772167.006
167263779506383315659369724259912582.717
1672637841986550375590374392027192686.122
167263734012281238069772196067290312891.458
1672637451883622985029138829673984797731101.834
16726376966301501907940767314306164940732105.780
167263710638826272660196452391851089212733106.391
167263718253964822821323647390770646227333107.170
1672637281405689635288664399009704145834334111.116
16726376046698591874104454506334068954549076938125.507
167263793216756128275840477687160280769505947939129.454
1672637159940142235031443817788545290783826932140130.233
1672637244258073928759945394129698921920185348140130.844
16726373765516829361692241323595555116710914227141134.790
16726375002826406593676584616984668286193738845105744145.166
1672637202090566233395120552272500148716929205326919346150.502
16726372140174557440752547775878850024871594209642513747153.906
167263766943305420791425965388579693850382180279027346952
9
51168.839
167263711486048469602081986433792908015112584227502382192
71
52169.618
167263717707053903882523915460345218900259005791906924974
161
53173.565
167263727041934695539847474366518949224956552386124238644
721
53174.175
167263715369592871844701046242326698006229895546887944385
172520287
59193.292
167263723693980587208072911759467902759059908162506837805
0970834617
60197.238
167263712716262256099490480738586566115060842827590130425
910168198322111
65212.950
167263717015753872630612377333965848408254229877773781147
1755273948063404535767
72236.624
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2015-04-30T11:21:00alpertronManual testing50000015000000121962.4480.0340.1570.0685.014%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2008-09-30T13:30:00markrManual testing??43.332142.33523e-70.1715.08759e-7
2008-07-15T07:45:00J FeitsmaManual testing??39.385122.04238e-80.1714.44961e-8


ECM factoring results:

Old Calculation Method

Total ECM effort:14.894 GHz-days
Estimated T-Level:24.482
DigitsB1CurvesCompleteFacMiss
2011000251 / 1002.5108.025%
2550000251 / 2800.89640.737%

New Calculation Method

Total ECM effort:14.894 GHz-days
Estimated T-Level:24.482
DigitsB1CompleteFacMiss
20110008.0970.030%
25500000.73248.105%
302500000.04595.594%
3510000000.00299.794%


ECM Summary

B1B2factorcurvesGHz-days
50000500000024814.72
50000500000030.178


Lucas-Lehmer results:
No L-L results for M1672637


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-02T22:57:26Oliver KruseGTX-0
13381097
718146695951
11071050492041
6292358170451872327
E495F7EC79D131C3no
2017-10-03T00:14:32kkmrkkblmbrbkManual testing
13381097
718146695951
11071050492041
6292358170451872327
E495F7EC79D131__no
2017-11-14T07:44:54ATHec2-1xf
13381097
718146695951
11071050492041
6292358170451872327
E495F7EC79D131__no
2018-02-04T19:54:06-p95holder- @bopoh13Lucius_Yorkfield
13381097
718146695951
11071050492041
6292358170451872327
254181561033970325423
240CB25E4BE980__no
2018-02-05T04:09:49AdolfNorManual testing
13381097
718146695951
11071050492041
6292358170451872327
254181561033970325423
240CB25E4BE980__no
2018-02-05T07:00:58-p95holder- @bopoh13t_i3-2100
13381097
718146695951
11071050492041
6292358170451872327
254181561033970325423
240CB25E4BE980__no
2018-02-15T04:23:15treborDesktop
13381097
718146695951
11071050492041
6292358170451872327
254181561033970325423
240CB25E4BE980__no


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
107
100
101
102
103
104
105
106
107
108
TF factor-bounds graph:
267
2
220
230
240
250
260
270
280
290
2100
Last modified: 2019-12-16T13:28:38+00:00