Primality Lines
by FullDeck and Missing a Few Cards Open on SudokuPad
Heartburn
- Primality lines
- Product cages
The brief
**Sudoku, Product Cages, Primality Lines** - Standard sudoku rules apply: The digits 1 through 9 appear in every row, column, and box. - Product Cages: The PRODUCT of all the digits in a cage is equal to the value shown in the upper left corner of the cage. Digits in cages cannot repeat. - Primality Lines: Digits along a primality line alternate prime (2357) and composite (4689). Since 1 is neither prime nor composite, 1 can never appear on a primality line. Subscribe to our mailing list to receive a weekly email with all of our puzzles from the previous week: https://missingdeck.net/mailing