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Cotton, J. S. & James Lunt (reviser) (2004). "Cunningham, Sir
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at a young age. From 1871 to 1881, he was instructor in mathematics at the
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in 1881, he continued teaching at military institutes in
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This article about a United
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272:{\displaystyle 2^{2^{n}}+1}
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228:{\displaystyle 2^{p}-1}
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