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P-Index Table 
The number of 5k runs that satisfy the rule 'p runs at least p times'.
For a P-index of 10, you would need to run more than 100 times, with at least 10 runs at 10 different events.
P-index Number of runners
19 2
18 1
17 5
16 9
15 12
14 23
13 52
12 104
11 217
10 568
9 1.2k
8 3.0k
7 7.4k
6 18k
5 42k
4 102k
3 272k
2 933k
1 6.0m

Updated 2026-06-20 16:00 UTC