Cantidad de primos por 10^n
n pi(10^n) reference 1 4 antiquity 2 25 L. Pisano (1202; Beiler) 3 168 F. van Schooten (1657; Beiler) 4 1229 F. van Schooten (1657; Beiler) 5 9592 T. Brancker (1668; Beiler) 6 78498 A. Felkel (1785; Beiler) 7 664579 J. P. Kulik (1867; Beiler) 8 5761455 Meissel (1871; corrected) 9 50847534 Meissel (1886; corrected) 10 455052511 Lehmer (1959; corrected) 11 4118054813 Bohmann (1972; corrected) 12 37607912018 13 346065536839 14 3204941750802 Lagarias et al. (1985) 15 29844570422669 Lagarias et al. (1985) 16 279238341033925 Lagarias et al. (1985) 17 2623557157654233 M. Deleglise and J. Rivat (1994) 18 24739954287740860 Deleglise and Rivat (1996) 19 234057667276344607 M. Deleglise (June 19, 1996) 20 2220819602560918840 M. Deleglise (June 19, 1996) 21 21127269486018731928 pi(x) project (Dec. 2000) 22 201467286689315906290 P. Demichel and X. Gourdon (Feb. 2001) 23 1925320391606803968923 T. Oliveira e Silva (pers. comm., Apr. 7, 2008) 24 18435599767349200867866 Platt 25 1768463093991437694116