Logic Masters Deutschland e.V.

A new twist to my series of prime constraint puzzles...
Region Sum lines with Prime Constraint

Rules:

• Normal Sudoku rules apply.
• Box borders divide region prime lines into segments of equal sum.
• That sum is always prime but may vary for different lines.
• Adjacent digits within those segments must add to a prime number.
  To clarify: This does not apply across box borders, but does apply to both, orthogonally and diagonally adjacent digits on each line segment within a box.
• Squares mark cells with even digits, cirlces those with odd digits.