Primbixes are primes of the form:
1 + 2 * r * s
Where r, s are primes.
Since r, s are primes, they might also be primbixes, which in turn contains new primes.
The data structure one gets from a primbix this way, is a binary tree.
A primbix value counts the number of leaves in the associated binary tree.
The minimum primbix sequence is a sequence that contains the smallest natural numbers of increasing primbix values. Due to the difficulty of theorem proving about this sequence, very little is currently known about it.
There is an ongoing effort to search for more terms in the minimum primbix sequence and these are the results so far:
2: 1
13: 2
53: 3
317: 4
3407: 5
8243: 6
49459: 7
197837: 8
1187023: 9
18314419: 10
112006043: 11
491325707: 12
2047857083: 13
9869296583: 14
The minimum primbix with value 15 is above 32 000 000 000 and less or equal to 370 837 765 219 (which has primbix value 15).
If you are interested in helping to reduce this bound, then you can take a look at this example code.
There are currently 8 dedicated CPU cores that increases the lower bound 24/7.
Primbixes have ideal properties for communication between two advanced civilization at galactic scale. This is because it is a simple definition that might be discovered independently by two advanced civilizations without previously being in contact. Sharing primbixes might be a way to establish common ground under first contact, plus that the interest to keep in touch, despite other difficulties of getting in contact such as extreme large distances, can be kept up by collaboration on primbix research.
Primes have fascinated mathematicians for over 2 millenia. However, with the invention of computers, primes are no longer as exciting they once appeared to be. Both efficient algorithms and theoretical advancements means we know a lot more about primes now than in the past.
Primbixes increases the difficulty compared to primes, in a way where the advantage of computers can be balanced with human intuition and creativity. A new discovery by a supercomputer can be used in combination with human knowledge that can compete with each other using secrets.
This way, primbixes are designed to let people become engaged as a hobby, in addition to expert researchers working in this field to advance human knowledge.