Six Primes: I. 13-7-6-4
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Six Primes: II. 11-7-6-4
2
Six Primes: III. 13-6-5-4
3
Six Primes: IV. 7-6-5-4
4
Six Primes: V. 13-11-8-6
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Six Primes: VI. 11-5-4-3
6