It is known that p is a two-digit prime number within 50, and 2p+1 is also a prime number. If the sum of all p is k, find the value of k.
已知p为50以内的一个两位质数，且2p+1也是质数．若所有p的和是k，求k的值．
<gadget id="calculator">11 * 2</gadget>
<output>22</output>

<gadget id="calculator">22 + 1</gadget>
<output>23</output>

<gadget id="calculator">11 + 23 + 29 + 41</gadget>
<output>104</output>

<result>104</result>