Prime p₀= 1647233199413171089 starts a Symmetric tuple of 20 consecutive primes (SPT).
d_n: 0 48 36 6 64 20 36 40 2 12 34 12 2 40 36 20 64 6 36 48 (?)
a_n: 0 48 84 90 154 174 210 250 252 264 298 310 312 352 388 408 472 478 514 562
All 20 integers p_n = p₀+a_n = p_n-1+d_n are prime and there are no other primes in the gaps.
diameter: 562
Found by: Donn Pike (USAF Ret)
db: batch=78, k=20, 48 36 6 64 20 36 40 2 12 34

SPT(16)	1647232065010773121	0 6 30 58 90 96 100 108 118 126 130 136 168 196 220 226	-1134402397968
SPT(16)	1647232081705776113	0 18 36 60 66 120 126 186 188 248 254 308 314 338 356 374	-1117707394976
SPT(16)	1647232168676378003	0 20 26 38 44 48 54 66 128 140 146 150 156 168 174 194	-1030736793086
TPT(14)	1647232512785833007	0 2 60 62 102 104 114 116 234 236 264 266 282 284	-686627338082
SPT(18)	1647232522935496813	0 24 40 46 66 130 246 270 304 450 484 508 624 688 708 714 730 754	-676477674276
STPT(10)	1647233156428709819	0 2 12 14 30 32 48 50 60 62	-42984461270
SPT(16)	1647233678427414527	0 14 30 36 50 62 74 84 92 102 114 126 140 146 162 176	479014243438
SPT(16)	1647233850492978281	0 8 20 32 50 72 102 120 128 146 176 198 216 228 240 248	651079807192
SPT(16)	1647234198718109219	0 12 14 80 114 152 158 180 182 204 210 248 282 348 350 362	999304938130
STPT(10)	1647234663858541787	0 2 12 14 42 44 72 74 84 86	1464445370698
SPT(18)	1647234698718910199	0 30 62 84 90 92 114 120 122 132 134 140 162 164 170 192 224 254	1499305739110