# List of all pairs of integers (x,y) such that # x + y is a square, gcd(x,y) is square-free, x >= y, and the only primes dividing x and y lie in S, # for all sets S = {2, p}, # where p ranges over all other primes less or equal to 250. # It contains 238 pairs (x,y), some of which may appear for more than one S. # Format: "(x,y)". # Computing this list took 558 seconds. # Authors: Rafael von Känel and Benjamin Matschke, 2015. # License: Creative commons 3.0 by-nc. # # # S = {2, 3}: # (1,-1) (2,-2) (2,-1) (2,2) (3,-3) (3,-2) (3,1) (4,-3) (6,-6) (6,-2) (6,3) (8,1) (9,-8) (12,-3) (16,9) (18,-2) (24,1) (27,-2) (48,1) (81,-32) (288,1) (486,-2) # # S = {2, 5}: # (1,-1) (2,-2) (2,-1) (2,2) (5,-5) (5,-4) (5,-1) (5,4) (8,1) (10,-10) (10,-1) (20,5) (25,-16) (50,-1) (80,1) (125,-4) # # S = {2, 7}: # (1,-1) (2,-2) (2,-1) (2,2) (7,-7) (7,2) (8,-7) (8,1) (14,-14) (14,2) (16,-7) (32,-7) (49,32) (56,-7) (98,2) (128,-7) (224,1) (448,-7) (512,-343) (32768,-7) # # S = {2, 11}: # (1,-1) (2,-2) (2,-1) (2,2) (8,1) (11,-11) (11,-2) (22,-22) # # S = {2, 13}: # (1,-1) (2,-2) (2,-1) (2,2) (8,1) (13,-13) (13,-4) (26,-26) (26,-1) (57122,-1) # # S = {2, 17}: # (1,-1) (2,-2) (2,-1) (2,2) (8,1) (17,-17) (17,-16) (17,-8) (17,-1) (17,8) (32,17) (34,-34) (34,2) (64,17) (272,17) (289,-64) (512,17) (578,-2) (1088,1) (4913,128) # # S = {2, 19}: # (1,-1) (2,-2) (2,-1) (2,2) (8,1) (19,-19) (38,-38) (38,-2) # # S = {2, 23}: # (1,-1) (2,-2) (2,-1) (2,2) (8,1) (23,-23) (23,2) (32,-23) (46,-46) (2048,-23) (24334,2) # # S = {2, 29}: # (1,-1) (2,-2) (2,-1) (2,2) (8,1) (29,-29) (29,-4) (58,-58) (1682,-1) # # S = {2, 31}: # (1,-1) (2,-2) (2,-1) (2,2) (8,1) (31,-31) (32,-31) (62,-62) (62,2) (256,-31) (961,128) (992,-31) (3968,1) # # S = {2, 37}: # (1,-1) (2,-2) (2,-1) (2,2) (8,1) (37,-37) (37,-1) (74,-74) # # S = {2, 41}: # (1,-1) (2,-2) (2,-1) (2,2) (8,1) (41,-41) (41,-32) (41,-16) (41,8) (82,-82) (82,-1) (128,41) (3362,2) (41984,41) # # S = {2, 43}: # (1,-1) (2,-2) (2,-1) (2,2) (8,1) (43,-43) (86,-86) # # S = {2, 47}: # (1,-1) (2,-2) (2,-1) (2,2) (8,1) (47,-47) (47,2) (94,-94) (128,-47) # # S = {2, 53}: # (1,-1) (2,-2) (2,-1) (2,2) (8,1) (53,-53) (53,-4) (106,-106) # # S = {2, 59}: # (1,-1) (2,-2) (2,-1) (2,2) (8,1) (59,-59) (118,-118) # # S = {2, 61}: # (1,-1) (2,-2) (2,-1) (2,2) (8,1) (61,-61) (122,-122) (122,-1) # # S = {2, 67}: # (1,-1) (2,-2) (2,-1) (2,2) (8,1) (67,-67) (134,-134) # # S = {2, 71}: # (1,-1) (2,-2) (2,-1) (2,2) (8,1) (71,-71) (142,-142) (142,2) (512,-71) # # S = {2, 73}: # (1,-1) (2,-2) (2,-1) (2,2) (8,1) (73,-73) (73,-64) (73,8) (146,-146) (146,-2) # # S = {2, 79}: # (1,-1) (2,-2) (2,-1) (2,2) (8,1) (79,-79) (79,2) (128,-79) (158,-158) # # S = {2, 83}: # (1,-1) (2,-2) (2,-1) (2,2) (8,1) (83,-83) (83,-2) (166,-166) # # S = {2, 89}: # (1,-1) (2,-2) (2,-1) (2,2) (8,1) (89,-89) (89,-64) (89,-8) (89,32) (178,-178) (8192,89) # # S = {2, 97}: # (1,-1) (2,-2) (2,-1) (2,2) (8,1) (97,-97) (97,-16) (128,97) (194,-194) (194,2) # # S = {2, 101}: # (1,-1) (2,-2) (2,-1) (2,2) (8,1) (101,-101) (101,-1) (202,-202) # # S = {2, 103}: # (1,-1) (2,-2) (2,-1) (2,2) (8,1) (103,-103) (128,-103) (206,-206) # # S = {2, 107}: # (1,-1) (2,-2) (2,-1) (2,2) (8,1) (107,-107) (214,-214) # # S = {2, 109}: # (1,-1) (2,-2) (2,-1) (2,2) (8,1) (109,-109) (218,-218) # # S = {2, 113}: # (1,-1) (2,-2) (2,-1) (2,2) (8,1) (113,-113) (113,-64) (113,-32) (113,8) (226,-226) (226,-1) (512,113) # # S = {2, 127}: # (1,-1) (2,-2) (2,-1) (2,2) (8,1) (127,-127) (128,-127) (254,-254) (254,2) (4096,-127) (16129,512) (16256,-127) (65024,1) # # S = {2, 131}: # (1,-1) (2,-2) (2,-1) (2,2) (8,1) (131,-131) (262,-262) # # S = {2, 137}: # (1,-1) (2,-2) (2,-1) (2,2) (8,1) (137,-137) (137,-128) (137,-16) (137,32) (274,-274) # # S = {2, 139}: # (1,-1) (2,-2) (2,-1) (2,2) (8,1) (139,-139) (278,-278) # # S = {2, 149}: # (1,-1) (2,-2) (2,-1) (2,2) (8,1) (149,-149) (298,-298) # # S = {2, 151}: # (1,-1) (2,-2) (2,-1) (2,2) (8,1) (151,-151) (302,-302) (512,-151) # # S = {2, 157}: # (1,-1) (2,-2) (2,-1) (2,2) (8,1) (157,-157) (314,-314) # # S = {2, 163}: # (1,-1) (2,-2) (2,-1) (2,2) (8,1) (163,-163) (326,-326) (326,-2) # # S = {2, 167}: # (1,-1) (2,-2) (2,-1) (2,2) (8,1) (167,-167) (167,2) (334,-334) # # S = {2, 173}: # (1,-1) (2,-2) (2,-1) (2,2) (8,1) (173,-173) (173,-4) (346,-346) # # S = {2, 179}: # (1,-1) (2,-2) (2,-1) (2,2) (8,1) (179,-179) (358,-358) # # S = {2, 181}: # (1,-1) (2,-2) (2,-1) (2,2) (8,1) (181,-181) (362,-362) (362,-1) # # S = {2, 191}: # (1,-1) (2,-2) (2,-1) (2,2) (8,1) (191,-191) (382,-382) # # S = {2, 193}: # (1,-1) (2,-2) (2,-1) (2,2) (8,1) (193,-193) (193,32) (386,-386) # # S = {2, 197}: # (1,-1) (2,-2) (2,-1) (2,2) (8,1) (197,-197) (197,-1) (394,-394) # # S = {2, 199}: # (1,-1) (2,-2) (2,-1) (2,2) (8,1) (199,-199) (398,-398) (398,2) (2048,-199) # # S = {2, 211}: # (1,-1) (2,-2) (2,-1) (2,2) (8,1) (211,-211) (422,-422) # # S = {2, 223}: # (1,-1) (2,-2) (2,-1) (2,2) (8,1) (223,-223) (223,2) (446,-446) (512,-223) # # S = {2, 227}: # (1,-1) (2,-2) (2,-1) (2,2) (8,1) (227,-227) (227,-2) (454,-454) # # S = {2, 229}: # (1,-1) (2,-2) (2,-1) (2,2) (8,1) (229,-229) (229,-4) (458,-458) # # S = {2, 233}: # (1,-1) (2,-2) (2,-1) (2,2) (8,1) (233,-233) (233,-64) (233,-8) (233,128) (466,-466) # # S = {2, 239}: # (1,-1) (2,-2) (2,-1) (2,2) (8,1) (239,-239) (478,-478) (114242,2) # # S = {2, 241}: # (1,-1) (2,-2) (2,-1) (2,2) (8,1) (241,-241) (241,-16) (482,-482) (482,2)