is 2 9883 - 1
has 2976 decimal digits
takes 0.000 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
Actualunknown1000000000100294988083290966.370164.0236%966.370164.0236%
Target2440.000268.1818%500100000.00001.2593%0.000268.5825%
Difference-44-0.0002-68.1818%+999999500+100294988073290+966.3701+62.7644%+966.3699-4.5589%

Known prime factors (7 factors, 448.6 bits, 4.53887481% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
9883158129617.2718
23
-881.770e-121.415e-92.879e-9
988310436449823.315528
24 × 3 × 11
-16161.260e-102.829e-95.758e-9
9883212582737031134.3071075497
3 × 358499
-33584994.149e-73.454e-66.450e-6
988317530187135419775291960.60588688592205908
22 × 3 × 29863 × 247487393
-2986324748739325.3900.00240.0045
98837409581004827166773612169.32837486497039497960
23 × 5 × 37 × 25328714215877
-372532871421587720,931244.01455.74
98835277760433632742155911716797717366335115.3452670120628165912251296021854557
3 × 11 × 19 × 200891 × 81222410083 × 260991875647
-812224100832609918756471.341e+1316.09429.229
988345082638753559154678920194337520660290339128.40622808175024567011372518564371911697
32 × 7 × 13 × 149 × 2529335563 × 73894806541365067549
2018-06-242529335563738948065413650675491.349e+13711,873,8301.330e+9

120 Composite Factors:
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2021-08-27Seth_TrManual testing400000000400000000-
skipped known factor: 158129
skipped known factor: 10436449
skipped known factor: 21258273703
skipped known factor: 1753018713541977529
--0.071--30.195%
2022-11-24Kevin_9611F1000000000100294988083290-
skipped known factor: 158129
skipped known factor: 10436449
skipped known factor: 21258273703
skipped known factor: 1753018713541977529
skipped known factor: 740958100482716677361
--966.4--64.024%


Trial Factoring results:
No TF results for M9883


ECM factoring results:
Total ECM effort:61.611 GHz-days
Estimated T-Level:41.067
DigitsB1CompleteFacMiss
20110001,109.6970.000%
2550000288.2830.000%
3025000062.8930.000%
35100000011.0670.002%
4030000001.64619.287%
45110000000.21380.778%
50440000000.02597.564%
551100000000.00399.742%


ECM Summary

B1B2factorcurvesGHz-days
50000500000050.001
2500002500000050.003
100000010000000040.010
30000003000000004443.389
30000003000000002,17016.56
30000006000000001,00010.12
10000000100000000090.229
1100000015000000001,00031.30


Lucas-Lehmer results:
No L-L results for M9883


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-21Oliver KruseOliver-PC7BCCA155FC7EDA__?
2017-09-21Oliver KruseManual testing7BCCA155FC7EDA__?
2017-10-02kkmrkkblmbrbkManual testing
158129
10436449
21258273703
1753018713541977529
740958100482716677361
52777604336327421559117167977173663
7BCCA155FC7EDA__no
2017-12-07ATHManual testing
158129
10436449
21258273703
1753018713541977529
740958100482716677361
52777604336327421559117167977173663
7BCCA155FC7EDA__no
2018-06-24axnskylake
158129
10436449
21258273703
1753018713541977529
740958100482716677361
52777604336327421559117167977173663
450826387535591546789201943375206602903
78D2D95A7F0F6F__no
2018-06-24francijezekmacos
158129
10436449
21258273703
1753018713541977529
740958100482716677361
52777604336327421559117167977173663
450826387535591546789201943375206602903
78D2D95A7F0F6F__no
2018-06-24francijezekmacos
158129
10436449
21258273703
1753018713541977529
740958100482716677361
52777604336327421559117167977173663
450826387535591546789201943375206602903
78D2D95A7F0F6F__no
2018-06-25arnaudstm-11-010
158129
10436449
21258273703
1753018713541977529
740958100482716677361
52777604336327421559117167977173663
450826387535591546789201943375206602903
78D2D95A7F0F6F__no


P-1 factor-bounds graph:
B1 = 1000000000, B2 = 100294988083290 (P-1 stage 2)
B1 = 1000000000 (P-1 stage 1)
B1 = 400000000 (P-1 stage 1)
100
101
102
103
104
105
106
107
108
109
1010
1011
100
101
102
103
104
105
106
107
108
109
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
TF factor-bounds graph:
this exponent TF target: 44
TF double-checked to: 67.8
ECM T-Level=41.07 ~= 120-bit
250
260
270
280
290
2100
2110
2120
2130
Last modified: 2023-04-26T21:34:10+00:00