1-digit prime factors: 6
2-digit prime factors: 3
3-digit prime factors: 2
4-digit prime factors: 5
5-digit prime factors: 8
6-digit prime factors: 15
7-digit prime factors: 18
8-digit prime factors: 36
9-digit prime factors: 40
10-digit prime factors: 57
11-digit prime factors: 81
12-digit prime factors: 103
13-digit prime factors: 142
14-digit prime factors: 160
15-digit prime factors: 163
16-digit prime factors: 169
17-digit prime factors: 186
18-digit prime factors: 203
19-digit prime factors: 224
20-digit prime factors: 261
21-digit prime factors: 274
22-digit prime factors: 272
23-digit prime factors: 323
24-digit prime factors: 359
25-digit prime factors: 353
26-digit prime factors: 378
27-digit prime factors: 361
28-digit prime factors: 463
29-digit prime factors: 507
30-digit prime factors: 528
31-digit prime factors: 565
32-digit prime factors: 613
33-digit prime factors: 614
34-digit prime factors: 661
35-digit prime factors: 659
36-digit prime factors: 671
37-digit prime factors: 652
38-digit prime factors: 703
39-digit prime factors: 794
40-digit prime factors: 762
41-digit prime factors: 830
42-digit prime factors: 797
43-digit prime factors: 850
44-digit prime factors: 825
45-digit prime factors: 796
46-digit prime factors: 834
47-digit prime factors: 830
48-digit prime factors: 813
49-digit prime factors: 804
50-digit prime factors: 806
51-digit prime factors: 792
52-digit prime factors: 795
53-digit prime factors: 818
54-digit prime factors: 726
55-digit prime factors: 734
56-digit prime factors: 666
57-digit prime factors: 663
58-digit prime factors: 651
59-digit prime factors: 641
60-digit prime factors: 588
61-digit prime factors: 596
62-digit prime factors: 553
63-digit prime factors: 491
64-digit prime factors: 522
65-digit prime factors: 497
66-digit prime factors: 459
67-digit prime factors: 437
68-digit prime factors: 394
69-digit prime factors: 362
70-digit prime factors: 304
71-digit prime factors: 315
72-digit prime factors: 276
73-digit prime factors: 263
74-digit prime factors: 228
75-digit prime factors: 213
76-digit prime factors: 182
77-digit prime factors: 152
78-digit prime factors: 155
79-digit prime factors: 128
80-digit prime factors: 131
81-digit prime factors: 95
82-digit prime factors: 79
83-digit prime factors: 79
84-digit prime factors: 55
85-digit prime factors: 57
86-digit prime factors: 47
87-digit prime factors: 42
88-digit prime factors: 31
89-digit prime factors: 32
90-digit prime factors: 23
91-digit prime factors: 18
92-digit prime factors: 12
93-digit prime factors: 10
94-digit prime factors: 5
95-digit prime factors: 3
96-digit prime factors: 3
97-digit prime factors: 4
99-digit prime factors: 3
100-digit prime factors: 1
243-digit prime factors: 1
Number of known prime numbers: 34911 (1634792 digits)
Perl script written by Dario Alejandro Alpern. Last updated on May 25th, 2015.