素數階乘素數

素數階乘素數是形如的素數，其中是素數階乘。PrimeGrid 正在進行針對此類素數的協同搜尋。

當 , 3, 5, 6, 13, 24, 66, 68, 167, 287, 310, 352, 564, 590, 620, 849, 1552, 1849, 67132, 85586, 234725, ... (OEIS A057704; Guy 1994, pp. 7-8; Caldwell 1995) 時是素數。這些對應於，其中 , 5, 11, 13, 41, 89, 317, 337, 991, 1873, 2053, 2377, 4093, 4297, 4583, 6569, 13033, 15877, 843301, 1098133, 3267113, ... (OEIS A006794)。已知的最大素數階乘素數總結在下表中。

		位數	發現者
		6845	1992年12月
		365851	PrimeGrid (2010年12月20日)
		476311	PrimeGrid (2012年3月5日)
		1418398	J. Winskill, PrimeGrid (2021年9月18日)

(也稱為歐幾里得數) 當 , 2, 3, 4, 5, 11, 75, 171, 172, 384, 457, 616, 643, 1391, 1613, 2122, 2647, 2673, 4413, 13494, 31260, 33237, 304723, ... (OEIS A014545; Guy 1994, Caldwell 1995, Mudge 1997) 時是素數。這些對應於，其中 , 3, 5, 7, 11, 31, 379, 1019, 1021, 2657, 3229, 4547, 4787, 11549, 13649, 18523, 23801, 24029, 42209, 145823, 366439, 392113, 4328927, ... (OEIS A005234)。截至 2024 年 8 月，已知的最大素數階乘素數總結在下表中 (Caldwell)。

		位數	發現者
		63142	2000年5月
		158936	2001年8月
		169966	2001年9月
		1878843	PrimeGrid (2024年7月27日)

是否有無限多個素數使得是素數或合數尚不清楚 (Ribenboim 1989, Guy 1994)。

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階乘, 階乘素數, 整數序列素數, 素數階乘

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參考文獻

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and

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and

." Math. Comput. 71, 441-448, 2002.Borning, A. "Some Results for

and

." Math. Comput. 26, 567-570, 1972.Buhler, J. P.; Crandall, R. E.; and Penk, M. A. "Primes of the Form

and

." Math. Comput. 38, 639-643, 1982.Dubner, H. "Factorial and Primorial Primes." J. Rec. Math. 19, 197-203, 1987.Dubner, H. "A New Primorial Prime." J. Rec. Math. 21, 276, 1989.Guy, R. K. Unsolved Problems in Number Theory, 2nd ed. New York: Springer-Verlag, pp. 7-8, 1994.

Leyland, P. ftp://sable.ox.ac.uk/pub/math/factors/primorial-.ZMudge, M. "Not Numerology but Numeralogy!" Personal Computer World, 279-280, 1997.Pickover, C. A. The Mathematics of Oz: Mental Gymnastics from Beyond the Edge. New York: Cambridge University Press, pp. 272-273, 2002.PrimeGrid. "PrimeGrid Primes: Subproject: (PRS) Primorial Prime Search." http://www.primegrid.com/primes/primes.php?project=PRS.PrimeGrid. "Primorial Prime Search Project: Range Statistics." http://www.primegrid.com/stats_prs.php.PrimeGrid. "PrimeGrid's Primorial Prime Search." Sep. 18, 2021. https://www.primegrid.com/download/prs-3267113.pdf.Ribenboim, P. The New Book of Prime Number Records. New York: Springer-Verlag, p. 4, 1989.Rivera, C. "Problems & Puzzles: Puzzle 010-Primes Associated to Primorials and Factorials." http://www.primepuzzles.net/puzzles/puzz_010.htm.Ruiz, S. M. "A Result on Prime Numbers." Math. Gaz. 81, 269-270, Jul. 1997.Sloane, N. J. A. Sequences A005234/M0669, A006794/M2474, A014545, and A057704 in "The On-Line Encyclopedia of Integer Sequences."Sun, J. "Coordinated Search for Primorial Primes." http://primorialprime.home.comcast.net/.Templer, M. "On the Primality of