2×7×11×17×23+23= (2×7×11×17 + 1) ×23= (2618+1) × 23= 2619×23now factorize 26192619 = 3×3×3×97 = 3³ × 972619 × 23 = 3³ × 97 × 23 = 3³ × 23 × 97So the PRIME factors are 3, 23 and 97.
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