is 2 1781699 - 1
has 536345 decimal digits
takes 0.097 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
Actual26716.677368.6567%500000150000000.10155.0523%16.778870.2403%1.5835%
PrimeNet2570.010863.1579%80001400000.00122.8120%0.012064.1939%1.0360%
GPU722610.172465.5738%80001300000.00121.4919%0.173666.0874%0.5136%
Difference+6+16.5049+3.0829%+492000+14870000+0.1003+3.5603%+16.6052+4.1529%+4.1529%

Known prime factors (5 factors, 245.3 bits, 0.01376690% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1781699213803881927.67260
22 × 3 × 5
-451.017e-113.189e-76.404e-7
178169912863866791030.261361
192
2008-07-153613618.656e-112.840e-55.779e-5
1781699625286159396631445.83017547469
19 × 923551
2014-01-30199235513.034e-60.00400.0074
17816992407902335497021552792167.70667573207806061
67573207806061
2018-12-0116757320780606131.061289,602540,896
1781699166324242754246203873772373.8164667574117576712
23 × 583446764697089
2020-05-1985834467646970892,047.82,500,5074,670,251

26 Composite Factors:
exponentprime factorscomposite factordigitsbits*
17816992750344644369011991857.932
1781699133688607614584112321032373.501
1781699804359786010895509491772376.090
1781699514818864398227271927148377992995.378
17816993097493488716357369684951284413097.967
1781699355607686052439676177292601013731101.488
17816991719752439694589682148127635593732103.762
17816992139572902738245873495359255098332104.077
17816991505628003565108266012458492093097735113.536
1781699104000246966355374164177235991883395137119.646
17816996622561292597869138215943319027927952138125.639
1781699457448990287872494885542844229285576502340131.749
1781699321909110504501983458644019960912101572173743141.208
1781699400492532577722998872873182868254078551318343141.523
17816991936819807315519782591215052268987709125538344143.797
178169922235656426365255421508224226917554371836383145147.318
1781699133784532310229714504858355374998151577933872946149.907
178169985626857776636111301978912118055433688350710206322
3
51169.194
178169941409959160173032105027801468072742815233920475414
23
52171.468
178169951518825894695639790199607689805305863583547900892
57
52171.783
178169928603652225697008962660709734451815175188535987380
7249
54177.578
178169925042243756255413612748247485274288633447371936921
9077329
57187.352
178169911014924920849225100922701888757818528026219108960
23483006417
61199.455
178169953541289040354254576658063883001332593452345293643
910672179313849
65215.024
178169932214008780317886993074610145652093559267813107214
7703708696500391
66217.613
178169968874800998000406528387717717023928787465619607051
870058157405234713817471
74245.285
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-16T12:33:24alpertronManual testing5000001500000012-
skipped known factor: 213803881
skipped known factor: 1286386679
skipped known factor: 62528615939663
--0.101--5.052%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2008-07-15T07:46:00J FeitsmaManual testing??30.261106.27328e-120.2071.34441e-11
2014-01-30T08:34:00TJAOIManual testing??45.830144.03723e-70.2078.65184e-7


ECM factoring results:

Old Calculation Method

Total ECM effort:17.767 GHz-days
Estimated T-Level:24.607
DigitsB1CurvesCompleteFacMiss
2011000258 / 1002.5807.480%
2550000258 / 2800.92139.729%

New Calculation Method

Total ECM effort:17.767 GHz-days
Estimated T-Level:24.607
DigitsB1CompleteFacMiss
20110008.3230.024%
25500000.75247.133%
302500000.04695.474%
3510000000.00299.788%


ECM Summary

B1B2factorcurvesGHz-days
50000500000025317.42
50000500000030.207
50000500000020.138


Lucas-Lehmer results:
No L-L results for M1781699


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-03T14:20:43Oliver KruseGTX-3
213803881
1286386679
62528615939663
0C817B47B46690__no
2017-11-04T19:27:01ATHec2-1xf
213803881
1286386679
62528615939663
0C817B47B46690__no
2018-12-01T12:20:02rucio
213803881
1286386679
62528615939663
240790233549702155279
721567AD24C1BF__no
2018-12-03T09:53:22Oliver KruseGTX-4
213803881
1286386679
62528615939663
240790233549702155279
721567AD24C1BF__no
2020-05-20T00:34:09CrypticCluecruncher
213803881
1286386679
62528615939663
240790233549702155279
16632424275424620387377
721567AD24C1BF67no


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
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105
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1010
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TF factor-bounds graph:
267
2
220
230
240
250
260
270
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290
2100
Last modified: 2020-10-30T10:29:41+00:00