decompwlj 3D

Primes congruent to 13 mod 27

A141956 on the OEIS · family primes

Weight–level plate of Primes congruent to 13 mod 27
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 viewerA141956 on the OEIS
Terms100,000 (n = 1 … 100,000)
Decomposable (a > 2d)99,998
Level class, k > L50,070 · 50.07 %
Weight class, k ≤ L49,928 · 49.93 %
Ties, k = L18
On the level line L = 115,377
Forced level, l ≤ d²398
Range of a(n)13 … 29,037,487
Range of the jump d54 … 2,700
Largest weight k, level L29,035,219, 526,891

45 different gaps occur, from 54 to 2,700; the level share is 50.07 %; L = 1 holds 31 % of the level class.

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.