is 2 10203883 - 1
has 3071675 decimal digits
takes 3.333 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-
PRP0EFA28E41FD82A__PRP-tested

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26911.700165.2174%2000000400000001.92806.9814%13.628167.6457%2.4283%
PrimeNet2640.348862.5000%4500013000000.05373.7559%0.402563.9085%1.4085%
GPU722685.841464.7059%7000016000000.07262.6552%5.914065.6430%0.9371%
Difference+1+5.8587+0.5115%+1930000+38400000+1.8553+4.3262%+7.7141+2.0027%+1.4912%

Known prime factors (5 factors, 233.9 bits, 0.00229216% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
10203883102038831926.6055
5
-158.771e-135.769e-79.640e-7
10203883317748916631134.8871557
32 × 173
2008-09-0891732.999e-108.495e-68.676e-6
1020388315627654969831340.50776577
73 × 1049
2008-09-087310492.261e-85.976e-57.037e-5
10203883283289177372668635432064.6191388143990737
32 × 7 × 13669 × 1611971
2017-11-221366916119710.44370.04770.0777
102038831781412766897513709932167.2728729092478312
23 × 17 × 353 × 2069 × 87881
2022-01-222069878813.92140.00320.0042

26 Composite Factors:
exponentprime factorscomposite factordigitsbits*
1020388332422728004441659531961.492
102038831594627644392793468732167.112
10203883496567043613091783527292375.394
1020388328906496494058758909642382332891.223
10203883181773276262697795767730291832993.876
102038839001482920316936867986293420093099.506
10203883506691206434059018868297281979931101.999
10203883566041976752535707570829573135931102.159
102038834427145520667037382487403919076932105.126
1020388327839304079924541439258125521411933107.779
102038839185007944556063875101227046089755147938126.111
1020388357758261604757919886285299343016240132939128.763
10203883451740753595750834742314568127425475103940131.731
10203883504654957295566167209563536549329940819940131.890
102038832840690044169030776672956635456135745488941134.383
10203883140672069295530840323708352990790116465884743140.013
10203883884590871112916197447381033535318509298989743142.666
1020388351494401900794493185214395289719400994561777536948158.495
1020388314354013505266960471078861924115577250532726168785
7
51166.618
1020388316035356595262506433332024391370099724794523894493
7
51166.778
1020388390262618401633637788495944673515697901531538469040
7
51169.271
1020388378865735514294010292161403850602868986105300199636
17
52172.398
1020388316362290416487262945871792037588914642714549333957
044848647
59193.382
1020388380473674578337446005141181122344153965883400752749
4141211727
60199.002
1020388325059502018895037649632355854628971992704785661535
3157376625071
63207.285
1020388325570422914501895534694731711823462408673368570086
252830869848970132001
71233.889
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2022-01-28T20:16:28riccardo ubertiColab_noGPU14200000040000000-
skipped known factor: 102038831
skipped known factor: 31774891663
skipped known factor: 1562765496983
skipped known factor: 28328917737266863543
skipped known factor: 178141276689751370993
--1.928--6.981%


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2022-08-06T12:05:46riccardo ubertiColab_noGPU1420000005000000027--2.749
2022-08-07T21:31:54riccardo ubertiColab_noGPU1423000006000000065--3.227


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2008-09-08T06:27:00Will EdgingtonManual testing??40.507138.25558e-97.1231.76411e-8
2008-09-08T06:27:00Will EdgingtonManual testing??34.887117.55901e-117.1231.61526e-10
2017-11-22T12:46:14TJAOIManual testing264265*64.619200.0956.7740.193
2022-03-22T17:30:14LordJuliusManual testing265266--0.732--
2022-03-22T17:30:14LordJuliusManual testing266267--1.465--
2022-01-22T13:07:56ViliamFManual testing26726867.272211.0096.7742.051
2022-01-22T13:07:57ViliamFManual testing267268
skipped known factors(?)
--2.929--
2022-01-22T13:07:57ViliamFManual testing268269--5.859--


ECM factoring results:
Total ECM effort:9.614 GHz-days
Estimated T-Level:2.500
DigitsB1CompleteFacMiss
20110000.50060.653%
25500000.04895.284%
302500000.00399.688%


ECM Summary

B1B2factorcurvesGHz-days
5000014400000109.61


Lucas-Lehmer results:
No L-L results for M10203883


PRP results:
dateuseridcompidcofactorsres64PRP
2020-02-16T09:03:58Bommer2600X
102038831
31774891663
1562765496983
28328917737266863543
0EFA28E41FD82A__no
2021-02-08T20:51:10XZT800G2Mini1
102038831
31774891663
1562765496983
28328917737266863543
0EFA28E41FD82A96no
2022-01-28T08:21:50riccardo ubertiNomad2C
102038831
31774891663
1562765496983
28328917737266863543
178141276689751370993
0EFA28E41FD82A96no


P-1 factor-bounds graph:
B1 = 2000000, B2 = 40000000 (P-1 stage 2)
B1 = 2000000 (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:
269
268
267
266
265
2
220
230
240
250
260
270
280
290
2100
Last modified: 2022-08-07T21:31:54+00:00