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Sequences
Sequence
Aliquot sequence
Home prime base 2
Home prime base 3
Home prime base 4
Home prime base 5
Home prime base 6
Home prime base 7
Home prime base 8
Home prime base 9
Home prime base 10
Home prime base 11
Home prime base 12
Home prime base 13
Home prime base 14
Home prime base 15
Home prime base 16
Home prime base 17
Home prime base 18
Home prime base 19
Home prime base 20
Home prime base 21
Home prime base 22
Home prime base 23
Home prime base 24
Home prime base 25
Home prime base 26
Home prime base 27
Home prime base 28
Home prime base 29
Home prime base 30
Home prime base 31
Home prime base 32
Home prime base 33
Home prime base 34
Home prime base 35
Home prime base 36
Inverse home prime base 2
Inverse home prime base 3
Inverse home prime base 4
Inverse home prime base 5
Inverse home prime base 6
Inverse home prime base 7
Inverse home prime base 8
Inverse home prime base 9
Inverse home prime base 10
Inverse home prime base 11
Greatest prime factor ^2+1
Greatest prime factor ^2+2
Greatest prime factor ^2-1
Greatest prime factor ^2-2
Greatest prime factor ^3+1
Greatest prime factor ^3-1
Silvester/Euclid sequence
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Show last 20 elements
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Status
n
Digits
Number
Checked
52
21
(show)
494645033040538178175
<21>
=
3
·
5^2
·
13
·
4578227
·
110813255659
<12>
Checked
53
21
(show)
386076982270887375105
<21>
=
3
·
5
·
11
·
59
·
14629697
·
2710832119
<10>
Checked
54
21
(show)
299224580350612477695
<21>
=
3
·
5
·
41^2
·
659
·
6521
·
2761459507
<10>
Checked
55
21
(show)
192316623289654490625
<21>
=
3
·
5^5
·
20513773150896479
<17>
Checked
56
21
(show)
128190568419952112895
<21>
=
3
·
5
·
53
·
1307
·
115777
·
1065592279
<10>
Checked
57
20
(show)
80945940474629652225
<20>
=
3
·
5^2
·
6798167
·
158760325589
<12>
Checked
58
20
(show)
52884700797214718655
<20>
=
3
·
5
·
3791831
·
929800594967
<12>
Checked
59
20
(show)
31730842793634114369
<20>
=
3
·
10576947597878038123
<20>
Checked
60
20
(show)
10576947597878038127
<20>
=
17
·
491
·
1267155576599741
<16>
Checked
61
18
(show)
644982188489277025
<18>
=
5^2
·
2153
·
11982948230177
<14>
Checked
62
18
(show)
155167196632628747
<18>
=
7
·
61
·
167
·
293
·
409
·
18157859
Checked
63
17
(show)
27216833742334453
<17>
=
7
·
17911
·
217079956789
<12>
Checked
64
16
(show)
3889855745845387
<16>
=
14347829
·
271111103
Checked
65
9
(show)
285458933
=
41
·
59
·
199
·
593
Checked
66
8
(show)
13917067
=
17
·
467
·
1753
Checked
67
6
(show)
858629
=
19
·
45191
Checked
68
5
(show)
45211
=
29
·
1559
Checked
69
4
(show)
1589
=
7
·
227
Checked
70
3
(show)
235
=
5
·
47
Checked
71
2
(show)
53
=
53
Prime
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