decompwlj 3D

Primes congruent to 20 mod 51

A142488 on the OEIS · family primes

Weight–level plate of Primes congruent to 20 mod 51
Click the plate to explore it in 3-D. Weight k across, level L up, both on log scales: blue in the weight class (k ≤ L), orange in the level class (k > L). The dashed diagonal is k = L.
Open in the 3-D viewerA142488 on the OEIS
Terms100,000 (n = 1 … 100,000)
Decomposable (a > 2d)99,998
Level class, k > L55,248 · 55.25 %
Weight class, k ≤ L44,750 · 44.75 %
Ties, k = L0
On the level line L = 115,797
Forced level, l ≤ d²799
Range of a(n)71 … 53,521,817
Range of the jump d102 … 5,508
Largest weight k, level L53,514,269, 509,459

48 different gaps occur, from 102 to 5,508; the level share is 55.25 %; there are no ties.

The decomposition

Every term of a strictly increasing sequence is written a(n) = k(n)·L(n) + d(n): the jump d = a(n+1) − a(n), the weight k the least divisor of a − d greater than d, the level L = (a − d)/k. A term decomposes when a > 2d; it is in the level class when k > L and in the weight class when k ≤ L. See decompwlj.com and arXiv:0711.0865, or how it works, with worked examples and a live one.