Prime p₀= 1978908511104887561 starts a Symmetric tuple of 18 consecutive primes (SPT).
d_n: 0 2 10 8 30 28 8 4 6 26 6 4 8 28 30 8 10 2 (?)
a_n: 0 2 12 20 50 78 86 90 96 122 128 132 140 168 198 206 216 218
All 18 integers p_n = p₀+a_n = p_n-1+d_n are prime and there are no other primes in the gaps.
diameter: 218
Found by: ChUcK
db: batch=80, k=18, 2 10 8 30 28 8 4 6 26

STPT(10)	1978906667712307469	0 2 12 14 90 92 168 170 180 182	-1843392580092
SPT(16)	1978906693830050099	0 12 38 62 110 140 164 168 194 198 222 252 300 324 350 362	-1817274837462
SPT(16)	1978906785607236007	0 4 24 70 84 96 120 124 132 136 160 172 186 232 252 256	-1725497651554
STPT(10)	1978906901753458877	0 2 54 56 72 74 90 92 144 146	-1609351428684
SPT(16)	1978907557621403971	0 6 28 48 58 90 108 118 168 178 196 228 238 258 280 286	-953483483590
TPT(14)	1978908471899836691	0 2 156 158 186 188 216 218 240 242 300 302 420 422	-39205050870
SPT(16)	1978908732176542723	0 30 46 58 78 88 96 120 166 190 198 208 228 240 256 286	221071655162
SPT(16)	1978909035708411773	0 30 54 74 96 126 168 198 206 236 278 308 330 350 374 404	524603524212
STPT(10)	1978909052576433119	0 2 18 20 30 32 42 44 60 62	541471545558
TPT(14)	1978909056020136041	0 2 48 50 156 158 228 230 270 272 300 302 390 392	544915248480
STPT(10)	1978909135987211567	0 2 12 14 42 44 72 74 84 86	624882324006