iii

Nombre premier 157. — Racines primitives 5, 6, 15, 18, 20, 21, 24, 13, 53, 55,

60, 61, 62, 63, i,i,, 69, 70, 72, 7.;. 7'.. 77. 80, 83, 84, 85, 87, 88, 91, 94, 95, 96, '.'7. 102, 104, 114, 119, 123, 131, 133, 130, 137. 139, 142, 151, 152. - Base 139.

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