42nd chen prime is 257

42nd chen prime is 257.

257 is 42nd chen prime.

Learn more about Chen primes.

Neighbours#

157₁₂	167₁₂	179₁₄	181₉	191₁₇
197₁₄	199₁₁	211₉	227₁₂	233₁₄
239₁₁	251₁₁	257₁₇	263₁₅	269₁₁
281₁₁	293₉	307₁₀	311₁₄	317₁₄
337₁₂	347₁₁	353₁₅	359₁₀	379₁₁

Compare with#

157₁₂	167₁₂	179₁₄	181₉	191₁₇
197₁₄	199₁₁	211₉	227₁₂	233₁₄
239₁₁	251₁₁	257₁₇	263₁₅	269₁₁
281₁₁	293₉	307₁₀	311₁₄	317₁₄
337₁₂	347₁₁	353₁₅	359₁₀	379₁₁

Learn more about Chen primes
Check first 50 chen primes
Check chen primes up to 500
Check all chen primes

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