13041, which in our number system is 3x3x3x3x7x23, in the special number system can either be 21x621 or 81x161, all four of which are prime in the special system (but none prime in real life).
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13041, which in our number system is 3x3x3x3x7x23, in the special number system can either be 21x621 or 81x161, all four of which are prime in the special system (but none prime in real life).