Logic Masters Deutschland e.V.

2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97. All one- and two-digit primes are conveniently listed above. Here are the rules:

1. Normal Sudoku rules apply.
2. Thin grey lines are palindromes, i.e. the Xth cell from one end must have the same digit as the Xth cell from the other end.
3. Thick grey lines are thermometers, i.e. digits increase from the bulb end.
4. For each grey line, the sum of its digits is prime.
5. Box borders divide the crimson lines into segments. Digits on each segment must make up a prime when read from left to right. The sum of all such primes on a crimson line must itself be prime.

The puzzle is also available online in the CtC App. I will greatly appreciate any feedback! Have fun solving!