Please read the following table in HTML format from a webpage and then answer the question in detail according to the table. Each table cell is defined by a <td> and a </td> tag. Each table row starts with a <tr> and ends with a </tr> tag. 'rowspan=m' and 'colspan=n' represents a cell spaning over 'm' rows and 'n' columns.

Webpage title:
Nihonium
Table title:
Isotopes
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=2 > Isotope </th><th colspan=3 rowspan=1 > Half-life </th><th colspan=1 rowspan=2 > Decay mode </th><th colspan=1 rowspan=2 > Discovery year </th><th colspan=1 rowspan=2 > Discovery reaction </th></tr>
<tr> <th colspan=1 rowspan=1 > Recent publications </th><th colspan=1 rowspan=1 > Ref </th><th colspan=1 rowspan=1 > NUBASE 2016 </th></tr>
<tr> <td colspan=1 rowspan=1 > 278Nh </td><td colspan=1 rowspan=1 > 1.4 ms </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 2.3 ms </td><td colspan=1 rowspan=1 > α </td><td colspan=1 rowspan=1 > 2004 </td><td colspan=1 rowspan=1 > 209Bi(70Zn,n) </td></tr>
<tr> <td colspan=1 rowspan=1 > 282Nh </td><td colspan=1 rowspan=1 > 73 ms </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 140 ms </td><td colspan=1 rowspan=1 > α </td><td colspan=1 rowspan=1 > 2007 </td><td colspan=1 rowspan=1 > 237Np(48Ca,3n) </td></tr>
<tr> <td colspan=1 rowspan=1 > 283Nh </td><td colspan=1 rowspan=1 > 75 ms </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 160 ms </td><td colspan=1 rowspan=1 > α </td><td colspan=1 rowspan=1 > 2004 </td><td colspan=1 rowspan=1 > 287Mc(—,α) </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > 284Nh </td><td colspan=1 rowspan=1 > 0.91 s </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 0.93 s </td><td colspan=1 rowspan=1 > α, EC </td><td colspan=1 rowspan=1 > 2004 </td><td colspan=1 rowspan=1 > 288Mc(—,α) </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > 285Nh </td><td colspan=1 rowspan=1 > 4.2 s </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 3.3 s </td><td colspan=1 rowspan=1 > α </td><td colspan=1 rowspan=1 > 2010 </td><td colspan=1 rowspan=1 > 289Mc(—,α) </td></tr>
<tr> <td colspan=1 rowspan=1 > 286Nh </td><td colspan=1 rowspan=1 > 9.5 s </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 7 s </td><td colspan=1 rowspan=1 > α </td><td colspan=1 rowspan=1 > 2010 </td><td colspan=1 rowspan=1 > 290Mc(—,α) </td></tr>
<tr> <td colspan=1 rowspan=1 > 287Nh </td><td colspan=1 rowspan=1 > 5.5 s </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > — </td><td colspan=1 rowspan=1 > α </td><td colspan=1 rowspan=1 > 1999 </td><td colspan=1 rowspan=1 > 287Fl(e−,νe) </td></tr>
<tr> <td colspan=1 rowspan=1 > 290Nh </td><td colspan=1 rowspan=1 > 2 s </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > — </td><td colspan=1 rowspan=1 > α </td><td colspan=1 rowspan=1 > 1998 </td><td colspan=1 rowspan=1 > 290Fl(e−,νe) </td></tr>
</table>
Question:
When  were 284Nh and 285Nh isotope of Nihonium discovered?
Answer:
 284Nh and 285Nh isotope of Nihonium  were discovered in 2004 and 2010 respectively.